Fix broken Deere1280x800-WXGA skin, fixes lp:1187090

Some image files where lost, probably when merging with bpmdelegate
branch , see https://bugs.launchpad.net/mixxx/+bug/1187090
Fix spacing in some skin.xml
Merge pull request #13 from esbrandt/lp1187090

Fix broken Deere1280x800-WXGA skin, fixes lp:1187090
Merge remote-tracking branch 'mixxxdj/master' into features_key
Add KeyUtils methods for dealing with octave changes.
Use KeyUtils methods in EngineBuffer and rename enableSoundTouch to be more generic. Don't include pitch in rate calculation.
Use KeyUtils in EngineBufferScaleRubberBand, cleanup comments.
Adjust the effective pitch using the rate slider.