Bump tools version to 20. Use it explicitly to overcome difficulties when tools have a major update
Use external script for uploading to maven: the current implementation fails on recent versions of gradle because of allJava
Abort if lint has something to say about library
Empty view should overlay all of the listview
Merge branch 'dev'

Conflicts:
	SuperListviewLibrary/src/main/res/layout/view_progress_gridview.xml
Allow adding OnScrollListener while supporting onMoreAsked
Hide empty view on progress (no overlaying of empty view)
Make gridview sample layout resemble listview's one
Show progress SwipeToRefresh progressbar by margining the empty view from top by progressbar's height

Backport: Set adapter and clear for concrete implementation of AbsListView, SwipeDismiss uses nineoldandroids now + MotionEventCompat voodoo
Merge branch 'dev'

Conflicts:
	SuperListviewLibrary/src/main/java/com/quentindommerc/superlistview/BaseSuperAbsListview.java
	SuperListviewLibrary/src/main/res/layout/view_progress_gridview.xml
Merge pull request #29 from Malinskiy/master

Empty view should overlay all of content