Mavenizing...
Merge branch 'master' of https://github.com/christopherperry/RoboBillingLibrary

Conflicts:
	RoboBillingLibrary/RoboBillingLibrary.iml
	RoboBillingLibrary/project.properties
merger
Proper Maven dependency setup for Android Library project dependency
Include src as source directory in IntelliJ settings
Include Java 1.6 language level in parent pom
Added support for providing injection bindings in overridden RoboBillingApplication class.
Update README.mdown with Maven instructions

Added Maven install instructions for Maven users.
When request fails due to RemoteException, keep the request in the queue, try rebinding. When rebind succeeds the pending request will be retried. This solves a non responding BillingService when the google play store crashes for whatever reason.