Merge branch 'issue_53' into 0.7.0

src/scripts/prelink.js

   throw 'RNFetchBlob could not found link Android automatically, some files could not be found.'
 }
 
+var package = JSON.parse(fs.readFileSync(PACKAGE_JSON));
+var APP_NAME = package.name;
+var APPLICATION_MAIN = process.cwd() + '/android/app/src/main/java/com/' + APP_NAME.toLocaleLowerCase() + '/MainApplication.java';
+
+if(!fs.existsSync(APPLICATION_MAIN)) {
+  throw 'RNFetchBlob could not found link Android automatically, MainApplication.java not found in path : ' + APPLICATION_MAIN
+}
+
+var VERSION = checkVersion();
+console.log('RNFetchBlob detected app version .. ' + VERSION);
+
+if(VERSION >= 0.29) {
+  console.log('RNFetchBlob patching MainApplication.java .. ');
+  var main = fs.readFileSync(APPLICATION_MAIN);
+  if(String(main).match('new RNFetchBlobPackage()') !== null) {
+    console.log('skipped');
+    return
+  }
+  main = String(main).replace('new MainReactPackage()', 'new RNFetchBlobPackage(),\n           new MainReactPackage()');
+  main = String(main).replace('import com.facebook.react.ReactApplication;', 'import com.facebook.react.ReactApplication;\nimport com.RNFetchBlob.RNFetchBlobPackage;')
+  fs.writeFileSync(APPLICATION_MAIN, main);
+  console.log('RNFetchBlob patching MainApplication.java .. ok')
+
+}
+
 // set file access permission for Android < 6.0
 fs.readFile(MANIFEST_PATH, function(err, data) {