working android gradle plugin build.
ignore android studio files.
catkinized, with local maven aar installs.
kazuto's fixes - inheritable ros activity and view handling so that camera view and visualization views can swap successfully.
use publishToMavenLocal task as that syncs with maven-publish later.
check if we are finishing already (this usually gets triggered from inside onDestroy() and avoid duplicating the finish call.
avoid confusion with qrcode and zeroconf scans.
android gradle plugin 0.5.0
    Re-enabling build of hokuyo driver and hokuyo tutorial
Merge pull request #2 from adamantivm/hokuyo-tutorial-squashed

Re-enabling build of hokuyo driver and hokuyo tutorial
added new class atribute to allow usb interface selection from outside
Modifying Gradle build of Hokuyo module to achieve Maven install on catkin_make
Merge branch 'usb-interface-selection' of github.com:sebasgm85/android_core into hydro-devel
Merge branch 'hokuyo-catkin' of github.com:adamantivm/android_core into hydro-devel
Merge branch 'hydro-devel' of github.com:mirzashah/android_core into hydro-devel