run cvs up before patching.

run cvs up before patching.
use (sign dir) for computing attachment points.
another (sign dir) fix for note markup
use stem::calc-duration-log for rest.
don't use guile -e main execution.
Examine Stem::duration_log() for preventing merge of quarter and halfnote. Fixes collision-heads.ly. Add separate regtest for that.
trim example.
excise cmr10
formatting.
use  SCM_ASSERT_TYPE for graphing functions.
nitpicks.