refactoring
added --force option to rendering
session rendering understands dependencies between rendering steps and re-performs necessary steps when required
improved AV sync in rendering. previously, a temporal difference between audio and video was possible due to a weak synchronization between capture onsets. however, this was rarely perceivable. this possible unsync has now been addressed.
added leading pause in rendering
Merge branch 'master' of github.com:alex-berman/tforms