add "Source" JSON input
refresh toolbar after moving elements between groups
bugfix: choosing color in the system color wheel (input type="color") was not propagated
add 100%, 75%, 50%, 25% options to width & height
human readable element labels (partial solution for https://github.com/Polyjuice/Launcher/issues/57)
bugfix: Direction, Stack buttons did not refresh the tiles
Merge branch 'gh-pages' into tiles-grid