Update JS snapshot to version 3.3.0-rc1 (via coho)
Set VERSION to 3.3.0-rc1 (via coho)
Forgot Apache Headers on MessageTest
CB-5481 Fix for Cordova trying to get config.xml from the wrong namespace
Update JS snapshot to version 3.3.0 (via coho)
Set VERSION to 3.3.0 (via coho)
Updating release notes to be in line with latest
Change CordovaWebView to derive from XWalkView.

The plain Cordova app is able to run.

TODO:
1. Plugin
2. Unit testing
Enable remote debugging.
Use XWalkSettings
Add Looper to the threat that plugin runs in.

This fixes the issue that Geolocation plugin does not work.
In XWalk, the thread which ExposedJsApi.exec() runs in does not contain
a message loop. As android.location.LocationManager need a loop to
process message, we have to prepare a Looper manually.
Fix file transfer plugin crash issue.

The root cause is the File Transfer API implementation leverages the android.webkit.CookieManager.
But trying to getinstance() of CookieManager before the webview isn't instantiated would cause crash.
In the cordova with xwalk backend solution, there doesn't exist webview.

According to android official document:
http://developer.android.com/reference/android/webkit/CookieManager.html#getInstance%28%29
We need to call "CookieSyncManager.createInstance(Context)" first.

Known issue:
This only fix crash issue, the cookie support is faking.
Still need to bridge xwalk cookie manager with default android.webkit.CookieManager.

BUG=https://github.com/otcshare/cordova-xwalk-android/issues/13
Add more detail comments and TODO for file transfer plugin crash issue.
Hook activity life-cycle events to XWalkView handlers.

It needs to hook activity life-cycle events (resume, pause, destory and
on activityresult) to XWalkView handlers. Otherwise, it causes black screen
when pause-resume cycles for apps.

BUG=https://github.com/otcshare/cordova-xwalk-android/issues/55
Enable the pause and resume timers based on XWalkView.

Enable them since XWalkView has the APIs.
Add xwalk extension system to cordova-xwalk-android.

Changes in this patch:
 1. Implement XWalkRuntimeViewProvider interface for CordovaWebView.
 2. Add a public class CordovaXWalkCoreExtensionBridge to provide the
    functionalities of friendly class XWalkCoreExtensionBridge.
Add xwalk_core_library to git ignore path

Otherwise, buildbot will not pack it into tarball.
Add empty implementation for loadDataForTest in CordovaWebView

Otherwise, build is blocked for abstract function not implemented.
Implement the destroyExtension interface

It is introduced in XWalkRuntimeViewProvider to destroy the native
resources occupied by extension.
Update the README.md according to Crosswalk dependency.