Update version and year in LICENSE.
Update copyright year automatically in OS X bundling.
Print some useful Qt debug information at boot-up.
Don't set the organization name since it results in incorrect (as we are using
it) QDesktopServices::DataPath results.

We don't use the app-store patch referred to in the comment anymore so this
should be fine.
Make bundle name (and binary name) upper-case on OS X.
Always build the codesign builder (otherwise we can get out-of-date signatures).
Fix default master output selection to use 2 channels.
Library scanner performance improvements.

For every directory, we were:
* Scanning the directory 3 times (once for hash, once for import, once for
  recursive descent).
* Continuously re-parsing the name-filters into regexps for every call to
  QDirIterator.

This change does one QDirIterator pass over the directory and uses a
pre-compiled QRegExp to check for compatible file names.

On a music collection of 18GB, 5000+ files and 1000+ folders, this produces a
20% speedup on first scan.
Improve language and logic.
Merge remote-tracking branch 'mixxx/master' into denon-mapping