added gui function model.get_all_attributes()
& associated handlers
fixes to passthrough editor for efficient loading
fixed passthrough editor tests
Merge branch 'dev' of https://github.com/OpenMDAO/OpenMDAO-Framework.git into guidev
fixed passthrough editor bug - component-level leaf not checkable
update all occurences of shutil.rmtree() to use fileutil.onerror, which catches a windows permission error
lint
Merge branch 'dev' into gui
Merge pull request #1307 from swryan/gui

add onerror handler to all shutil.rmtree invocations
Fixes to plugin docs
Merge branch 'dev' of https://github.com/OpenMDAO/OpenMDAO-Framework.git into guidev
Tests pass
Merge pull request #1308 from thearn/guidev

Guidev
Merge pull request #1309 from Kenneth-T-Moore/docs

A fix for displaying plugin docs on OS X