prevent playlist reordering when it is locked
Prevent having to rebuild DlgAbout and MixxxApp every time build.h changes.

Push all code that deals with build.h and defs_version.h into util/version.cpp.
Merge pull request #22 from kain88-de/bug_1192075

Check for playlist locks when re-ordering or dropping to table view.
Merge remote-tracking branch 'upstream/master' into mb_errorMessage
remove html code from .ui