Widget Config Stub

This is just a prototype test stub.
Added prototype InboxPolling
Merge pull request #108 from Rroia/v2-message-polling

Added prototype InboxPolling
Merge branch 'v2-widgetconfig' of https://github.com/andrewgiang/RedReader into andrewgiang-v2-widgetconfig

Conflicts:
	AndroidManifest.xml
Merge branch 'v2-widgetconfig' of https://github.com/andrewgiang/RedReader into andrewgiang-v2-widgetconfig

Conflicts:
	AndroidManifest.xml
Initial integration of RRSingleTouchViewWrapper and RRListView
Velocity tracking added to listview. Concurrency bugfix needed to avoid the "jumping" effect
Fixed RRListView bug causing jerky scrolling
Tidied up some things, improved listview touch responsiveness
Significant improvements to custom view hierarchy
Initial invalidation/relayout in view hierarchy
Initial swiping support
RRListView velocity bugfix
RRListView minor improvements, addition of acceleration to centre when swiping items. Bug discovered when animating off-screen items.
Fixed RRListView bug when animating off-screen items
Fixed RRListView bug when animating off-screen items
Undid debug code
Scroll bounce bugfix (cache position was getting out of sync with uncached position)
Improvements to scroll bouncing, particularly at the top of the list
Made top list bounce less springy