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
Add proper Modplug icon to Preferences window. This patch also adds the icon in the style of OpenMPT to the Mixxx icon template.
Remove executable bit for some icons in res/images/preferences
Merge pull request #13 from esbrandt/lp1187090

Fix broken Deere1280x800-WXGA skin, fixes lp:1187090
Merge pull request #14 from esbrandt/modplug_icon

Add proper Modplug icon to Preferences window
Delete mixxx-win32lib-msvc.
Cherry-pick .gitignore from master_sync and add some Mixxx-specific folders.
Add emacs lock-files to .gitignore.
Remove Bazaar support code and .bzrignore.
Remove existence tests for .sconf_temp and .sconsign.dblite from Debian rules.
Try to fix Ubuntu build by turning off build directory swapping when building debs.
Provide  when cleaning in Debian rules.
On Ubuntu, replace underscores in branch name with dashes.