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