Reimplement album shuffle so that output is more random

Removed the flawed Fisher-Yates shuffle and implemented a more (processor at least) efficient implementation involving Collection.shuffle() being called on an album list.
Add confirm dialog to delete action
hopefully fix misterious fixSlashes() crash?!
Remove broken rescan feature
This won't work on 4.4 and is a minor feature -> drop it
check song.path for nullpointer
Change button highlight color to holo-blue
..and optimize other PNG files via optipng
Bring back missing string item
Transifex could not handle the duplicate 'deleted' key, so we are
renaming it
update translations
get rid of READ_PHONE_STATE permission
This permission was only used to autoresume after a call - a feature i always disliked anyway
remove fastscroll legacy code
enable fastscroll in queuelist
initial bare-bones support for playcounts
add playcount sorting option
make buildMediaQuery private
use MediaUtils.TYPE_SONG
GC support for playcounts
upgrade translations
Release 0.9.24
Merge pull request #71 from piemonkey/random-albums-just-code

Reimplement album shuffle so that output is more random
use own class as cache key