Merge pull request #12 from Waiski/devel

Add a confimation dialog on back button press.
open player context menu on click
Implemented list reordering by dragging
show soft keybord when opening PlayerAddDialog
fix crash when sorting after removing player
A more sensible, self-contained PlayerArrayAdapter
replace tabs with spaces
implemented player renaming
strip leading and trailing space from player names
misc refactoring