Change log for Android SDK Tools.

Revision 8:
- New SDK component: platform-tools. This makes all platform use the same
  latest version of aapt/aidl/dx.
- Support for true debug build. No need to change the value of debuggable in
  the Android Manifest.
  "ant debug" will automatically insert debuggable==true, while "ant release"
  will not.
- new overridable Ant javac properties: java.encoding, java.source, and java.target
  (default to "ascii", "1.5" and "1.5")


Revision 7:
- Support for Ant rules provided by the Tools components (override the one in
  the platform component)
- Added support for libraries with library dependencies.
- Support for aidl files in library projects.
- Support for extension targets in Ant build to perform tasks between the
  normal tasks: -pre-build, -pre-compile, -post-compile.
- Headless SDK update. See 'android -h update sdk' for more info.
- Fixed location control in DDMS to work in any locale not using '.' as a
  decimal point.


Revision 6 (05/2010)
- 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.