Comment 2 for bug 927304

Some controls to correct the bpm/beatgrid were added to the upcoming v1.12 release.

* [ChannelN]_beats_translate_curpos
   Adjust beatgrid so closest beat is aligned with the current playposition.
   Beatgrid moves to align with current playposition.
* [ChannelN]_beats_adjust_faster8
   Adjust the average BPM up by +0.01
   Beatgrid lines move closer to each other.
* [ChannelN]_beats_adjust_slower
   Adjust the average BPM down by -0.01.
   Beatgrid lines move further apart from each other.
* [ChannelN]_beats_translate_earlier
   Move Beatgrid earlier
   Beatgrid moves left by a small amount.
* [ChannelN]_beats_translate_later
   Move Beatgrid later
   Beatgrid moves right by a small amount.

See https://github.com/mixxxdj/mixxx/pull/325
Controls/buttons just need to be added to the respective skin though.