- Updating Gradle project to > 1.0.0

- Updated .gitignore with Github ignore settings
- Updated build tools and SDK versions to 22
- Migrated .gradle files from pre-1.0.0 to post-1.0.0

usbSerialExamples/build.gradle

@@ -1,20 +1,20 @@
-apply plugin: 'android'
+apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 19
-    buildToolsVersion "19.1"
+    compileSdkVersion 22
+    buildToolsVersion "22.0.1"
 
     defaultConfig {
         minSdkVersion 14
-        targetSdkVersion 19
+        targetSdkVersion 22
 
-        testPackageName "com.hoho.android.usbserial.examples"
+        testApplicationId "com.hoho.android.usbserial.examples"
         testInstrumentationRunner "android.test.InstrumentationTestRunner"
     }
 
     buildTypes {
         release {
-            runProguard true
+            minifyEnabled true
         }
     }
 }