Upgrades official branch for 0.1.0 release

This is the culmination of alot of commits over the last 3-4 months.

* Android studio compatibility
* Android gradle plugin
* Uses the ros-android gradle plugin for centralising build.gradle information
* Hokuyo code moved out (to javaland and android_extras)
* Dependencies from our own maven repository.
* Publishing to the ros workspace & maven local.

Note: old version has been tagged 0.0.0. Also once this goes in, we will keep hydro-devel around for a little while before deprecating (as it is a working solution) until the bugs have been weeded out from this branch.