Bump plugin version
Use release version of robolectric
Fix signature validation

https://code.google.com/p/marketbilling/source/detail?spec=svn7bc191a004483a1034b758e1df0bda062088d840&r=7bc191a004483a1034b758e1df0bda062088d840
Upgrade android sdk
Newer sdk level
Add debug
Disable notifications
Sdk level
Re-enable libs
[maven-release-plugin] prepare release 0.0.3
[maven-release-plugin] prepare for next development iteration
Bump version
Update IabHelper : 20 sku limit in getSkuDetails

change codes and small refactoring from this https://code.google.com/p/marketbilling/issues/detail?id=136
delete diamonds operators
Add batching for more than 20 skus