Dropbox functionality nearly finished

it now can syncronize decks, replays, skins, sounds (currently disabled)
and textures asyncron.
add
fix
Merge pull request #169 from sidschingis/master

fix
fix
Dropbox usability improvements

to pass the dropboxtestingscenario
Merge remote-tracking branch 'upstream/master'
add new DP14
Merge pull request #170 from sidschingis/master

fix
Checkmate Changes + Internet detect fix
Merge
Error fix
Merge remote-tracking branch 'upstream/master'