[ardour-dev] SVN commit

[Jesse Chappell]

* added logarithmic option for waveform scaling (flagrant disregard
for feature-freeze)

* added/fixed  save/restore of rectified and logscale waveform options
in session

* modified sconstruct to look for certain libs in some common
locations (/usr/local and /opt/local), this
 should be user controllable but isnt yet.

* deals better with the libsndfile build when flac is installed

-r1219

jlc