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
Merge branch 'dev' of https://github.com/OpenMDAO/OpenMDAO-Framework.git into guidev
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
Fixed formatting issues (inconsistent bullets, etc.); deleted old favicon from _static.
Merge pull request #1310 from pziegfeld/mar20_format

Fixed formatting (inconsistent bullets, etc.); deleted old favicon from _static.
Fixed a test failure in Win