Added new method to check if intent can be handled

- canHandleIntent checks for available broadcast receivers
Add hasFacingBackCamera

 − インカメラしかない場合Camera.open()がnullになってしまうので、事前確認したい場合に使用する。
Merge pull request #20 from tamotamago/feature/canHandleIntent

Added new method to check if intent can be handled
fix javadoc for hasFacingBackCamera
Merge pull request #21 from hidey/hasFacingBackCamera

Add hasFacingBackCamera
Merge pull request #22 from KeithYokoma/master

Introduce bitmap api backport compatibility class
Update classpath for ADT 22

ADT from version 22 adds a "private libraries" directory which must be exported.
Merge pull request #23 from guillaume-mixi/master

ADT22対応
Add strict mode compatibility to enable strict mode by reflection