Also update the buildToolsVersion to the minimum for Android Studio 0.8.6
Add debug log output whether crash log transmission succeeded or not

Without this there is no way to tell from the logs whether the
transmission actually has happened or not. That is good to know in case of
network problems, so add some debug output.
Merge pull request #44 from sschuberth/develop

Add debug log output whether crash log transmission succeeded or not