[feature] added BambooStorage listeners, tests in progress, see #14
[feature] fully implemented notify/listen for BambooStorage with tests, closed #14
Merge branch 'issue-14'
[project] switched Travis CI to x86 android-19 emulator, should be faster
[project] little change for Travis CI script, javadoc fix in IBambooStorableItem
[project] removed test info from bamboostorage/build.gradle
[project][ci] changed Travis CI script, should start tests
[ci] switched back to armeabi-v7a, may be tests will start on it..
[test] improved async tests in ListenersNotifyingIntegrationTests
Merge pull request #20 from artem-zinnatullin/master

Implemented notifying listeners about changes from BambooStorage, resolves #14