Provide option to update spec of fireworks.
Rearrange command line options.
Merge branch 'master' of github.com:materialsproject/fireworks

Conflicts:
	fireworks/scripts/lpad_run.py
Add ifnore errors to FileDeleteTask.
Set ignore errors to true.
Add ignore errors to CompressDir.
Fix doc.
Merge branch 'master' of github.com:materialsproject/fireworks
merge in SP's changes on spec update method and command line reorg
Merge branch 'materialsvirtuallab-master'