Change log for Android SDK Tools.

Revision 6:
- Support for library project to share code/resources among projects
    - Updated Ant rules and custom tasks
    - New "android create lib-project", "android update lib-project" actions.
    - New parameter for "android update project"
 

Revision 5 (03/2010):
- AVD/SDK Manager:
	- Fixed SSL download for the standalone version of the SDK Updater.
	- Fixed issue with 64bit JVM on windows.
	- Add support for samples components.
	- improved support for dependency between components.
	- AVDs now sorted by API level.
	- Prevent deletion of running AVDs.
	- Settings are now automatically saved, no need to click Apply.
- Emulator now requires sd card to be 9MB and above.
- Fixed layoutopt.bat to correctly execute on Windows.