add two functions to NSWorkspace.

update info.plist , I guessed the wrong bundleIdentifier was caught by unit test.
also skip the post keyboard events test on Mavericks (rumored named Sea Lion) as the underlying API was deprecated.

update to pass all extra tests.

need shutdown TextEdit so that it won't break the subsequent tests.

bump version to 0.5.3
Merge branch 'new_launch' of github.com:jonnyyu/accessibility_core into new_launch