Replaces old school release with new jCenter release scripts

The problem: All Novoda Open source libraries should be released to bintray's jCenter now. The script used for SQLiteProvider works on Android projects only: https://gist.github.com/hal9002/691bbf3340dde3a4591d

Solution: I've created a new script for java projects: https://gist.github.com/hal9002/810b1d3e841fd6160c5d

And the Novoda util script chooses the one to be used: https://gist.github.com/hal9002/0772dffbd8a6a81bc176#file-novoda-bintray-upload-gradle-L1-L5

**Note**: I've downgraded the version to 2.2.7 which is the latest release. Once this PR gets merged, I'll release to jCenter and increase the version and add -SNAPSHOT