extract controls from twitter, add mock model

Change-Id: I977ce347d9d414c502012a7c4adb9e7223c4b987
Reviewed-by: Tomasz Olszak <olszak.tomasz@gmail.com>
ViewStyle added

Change-Id: Ib8e02efb8cfb73cc3a6eb763a3ad857aee79daf7
Reviewed-by: Tomasz Olszak <olszak.tomasz@gmail.com>
ToolBar added, view can be stylized

Change-Id: Iec62a0797c3ab0e40b20c80095b1a0099652111a
Reviewed-by: Tomasz Olszak <olszak.tomasz@gmail.com>