Restructure API lib folder to support Eclipse

OpenPGP-Keychain-API/libraries/keychain-api-library/build.gradle

@@ -15,6 +15,19 @@ android {
     compileSdkVersion 19
     buildToolsVersion '19.0.1'
     
+    // NOTE: We are using the old folder structure to also support Eclipse
+    sourceSets {
+        main {
+            manifest.srcFile 'AndroidManifest.xml'
+            java.srcDirs = ['src']
+            resources.srcDirs = ['src']
+            aidl.srcDirs = ['src']
+            renderscript.srcDirs = ['src']
+            res.srcDirs = ['res']
+            assets.srcDirs = ['assets']
+        }
+    }
+    
     // Do not abort build if lint finds errors
     lintOptions {
         abortOnError false