add missing modifier lookups


git-svn-id: https://svn.blender.org/svnroot/bf-extensions/trunk/py/scripts/addons@4271 96b784f8-4ae3-dd11-aff7-0030488c597c
add button to initialize armature layers, since this isn't allowed on draw anymore.


git-svn-id: https://svn.blender.org/svnroot/bf-extensions/trunk/py/scripts/addons@4272 96b784f8-4ae3-dd11-aff7-0030488c597c
minor code cleanup


git-svn-id: https://svn.blender.org/svnroot/bf-extensions/trunk/py/scripts/addons@4273 96b784f8-4ae3-dd11-aff7-0030488c597c