'ant comps' target

This target only compiles component changes, skipping GWT compilation, and
pushes the companion to a connected device. Use only when working exclusively
with components.

Change-Id: I33cf4fa29ff2590258d35a2d73f7d1c7a8238213
A ListView component

Similar to the ListPicker but placed on the main screen instead of
opening in a diferent activity

Change-Id: Ia3c72d4163e265c8b8df254ecc1c9c9d57df3446