[ardour-dev] recent SVN commits

[Paul Davis]

  * fix (?) crash bug when closing a session (typically accompanied by a
message from glib about a mutex being held)
  * revert FFT_ANALYSIS=true default to false, and check for fftw3.h if
it is set to true
  * make shift-scrollwheel adjust height of automation tracks
  * re-enable action of middle button on a redirect name in redirect box
  * more fixes for generic MIDI control and feedback 
  * make shift-click ("extend selection") work for tracks

  * rev 1233