Updated Companion App.

Update Version Number of Companion to 2.06 (versionCode 206). Make
instruction text smaller so the connect buttons don't scroll off the
screen on some devices. Update version Skew to handle compatibility
between master and release v133.

Change-Id: Ic67cfeb64970ebf72171e04b762c678bc677c491
Updated GWT to version 2.5.1, gwt_dnd to version 3.2.3, guava and guava-gwt to version 14.0.1
Remove old versions of these packages

Change-Id: Ic3109cb9017a31a552bbc0f0904921b2bfe922de