diff --git a/.idea/misc.xml b/.idea/misc.xml
index c27c7ebd..41c22422 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -74,7 +74,7 @@
   <component name="ProjectModuleManager">
     <modules />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="1.6" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" assert-keyword="true" jdk-15="true" project-jdk-name="1.7" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="PropertiesComponent">
diff --git a/android-app-tests/android-app-tests.iml b/android-app-tests/android-app-tests.iml
index 38698c84..d50c06a6 100644
--- a/android-app-tests/android-app-tests.iml
+++ b/android-app-tests/android-app-tests.iml
@@ -71,36 +71,37 @@
     <orderEntry type="library" exported="" scope="TEST" name="wagon-http-shared-1.0-beta-6" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="xercesMinimal-1.9.6.2" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="nekohtml-1.9.6.2" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="simple-xml-2.6.1" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="core" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="commons-cli-1.2" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="annotations-2.0.1" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="core" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="internal_impl-21.0.3" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="stax-1.2.0" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="common-msg-1.0.5" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="support-annotations-21.0.3" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="common-msg-1.0.5" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="common-listeners-1.0.7" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="guava-11.0.2" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="common-text-1.0.7" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="library-2.4.0" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="acra-4.5.0" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="internal_impl-21.0.3" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="common-core-1.0.7" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="jscl-1.0.8" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="common-security-1.0.7" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="_home_serso_projects_java_serso_android_calculatorpp_android_app_build_intermediates_classes_debug" level="project" />
-    <orderEntry type="library" exported="" scope="TEST" name="_home_serso_projects_java_serso_android_calculatorpp_android_app_build_intermediates_dependency_cache_debug" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="classes" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="_home_serso_projects_java_android_calculatorpp_android_app_build_intermediates_classes_debug" level="project" />
+    <orderEntry type="library" exported="" scope="TEST" name="_home_serso_projects_java_android_calculatorpp_android_app_build_intermediates_dependency_cache_debug" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="android" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index c52f1c8d..dc76432b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -24,7 +24,7 @@ buildscript {
     mavenCentral()
   }
   dependencies {
-    classpath 'com.android.tools.build:gradle:0.14.2'
+    classpath 'com.android.tools.build:gradle:1.0.0'
   }
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 627267b6..e383e28c 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Jan 20 21:39:57 CET 2015
+#Wed Jan 28 20:56:36 CET 2015
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip