New gradle folder structure for API Demo

OpenPGP-Keychain-API-Demo/build.gradle

@@ -0,0 +1,62 @@
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:0.7.3'
+    }
+}
+
+apply plugin: 'android'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile 'com.android.support:support-v4:19.0.+'
+}
+
+android {
+    compileSdkVersion 19
+    buildToolsVersion "19"
+
+    defaultConfig {
+        minSdkVersion 8
+        targetSdkVersion 19
+    }
+
+    /*
+     * To sign release build, create file gradle.properties in ~/.gradle/ with this content:
+     *
+     * signingStoreLocation=/home/key.store
+     * signingStorePassword=xxx
+     * signingKeyAlias=alias
+     * signingKeyPassword=xxx
+     */
+    if (project.hasProperty('signingStoreLocation') &&
+            project.hasProperty('signingStorePassword') &&
+            project.hasProperty('signingKeyAlias') &&
+            project.hasProperty('signingKeyPassword')) {
+        println "Found sign properties in gradle.properties! Signing build…"
+        
+        signingConfigs {
+            release {
+                storeFile file(signingStoreLocation)
+                storePassword signingStorePassword
+                keyAlias signingKeyAlias
+                keyPassword signingKeyPassword
+            }
+        }
+
+        buildTypes.release.signingConfig = signingConfigs.release
+    } else {
+        buildTypes.release.signingConfig = null
+    }
+    
+    // Do not abort build if lint finds errors
+    lintOptions {
+        abortOnError false
+    }
+}