add Python 2.7.2 note in docs
tell people to use python setup.py test … nose has problems with the current django setup
allow FWs to direct jobs to a certain directory
update to v0.22
really minor doc update
update TODOs
add use_root to script_task and templatewriter_task
remove useless dirs when setting _launch_dir
document remove useless dirs
change _use_root to _use_global_spec and document it
update to v0.23
merge with master branch