bump version to 0.5.1

bump version to 0.5.0

bump version to 0.4.2

bump version to 0.4.1

bump version to 0.4.0

install Node for window.open() Windows

In previous v8 code, in the middle of loading, KURL returns about:blank
for invalid URL. So we simulate the same behaviour here.

Fix nwjs#303

Relaunch 96112f4 with fix for Mac.

node-webkit v0.3.5 is released.

[Test] Test case for nwjs#196.

node-webkit v0.3.3 is released.

Core
* Add automatic tests.
* Make libuv loop pause in nested message loop (like a call to "alert()").
* Add 'plugins' dir in app to plugin search path.
* Fix crashes caused by creating V8 handles without handle scope.
* Expose window object to Node's context.
* The 'node-main' script should executes before window context is created.

Devtools
* Force closing previous debug session.

Mac
* Improve message loop's performance and stability.
* Fix crash when dragging images.

Windows
* Fix crash on Windows XP.