allow to configure color of BBC meter
change metric-scale on the sides of meterbridge when scrolling
explicitly re-init meter when theme changes.

fixes:
14:14 < oofus> rgareus: BBC meter colour changed, all meters
               except the one on the tool bar picked it up
add option to resize meterbridge track-labels
use K-20 meter as default master bus
fix compiler warning
change default BBC-meter color
tweak meterbridge-label height
Add relavent OSX midi options in the startup dialog
- MIDI driver options are now "None" and "coremidi" on OSX
- If coremidi is selected, jack will start with midi activated
- Requires Jack OSX version 0.90 beta 15 (or another version that
  supports midi
Send a song position pointer with mmc and fullframe fake locating
Add method to send a song position pointer message
Moving Mclk locating code to ticker.cc. Housekeeping
Housekeeping, code style
Proper OSX/CLANG/CXX11 support in stl_delete.h
- replaces fix in 066df0d218ee4391eb3e15259deca5ccc190ed84
- Check if _LIBCPP_VECTOR is defined for vector_delete.
  This is defined in libc++'s headers which Apple is using
  instead of libstdc++
Cast param for std::time to a pointer of time_t
- bleeding clang (trunk 186535 v3.4) fails here
Return an empty string instead of a bool
Merge branch 'clang-rebased' of https://github.com/axetota/ardour
fix issue with generator plugins and no-roll disk monitoring
Revert "fix issue with generator plugins and no-roll disk monitoring"

This reverts commit bd34ab04cd43ed2f5bf6eebb8b6ea0e0e5cbb727.
disconnect AuxSend connection when deleting bus

fixes crash:
 - add bus
 - aux-send a signal to that bus
 - delete bus
 - add another bus
 - aux-send a signal to "another bus"
 - click "Aux Send" button on "another bus"
 - crash