Merge remote-tracking branch 'origin/master' into feature/cale/xmodule-storage-model

Conflicts:
	cms/djangoapps/contentstore/course_info_model.py
	cms/djangoapps/contentstore/module_info_model.py
	cms/djangoapps/contentstore/tests/factories.py
	cms/djangoapps/contentstore/tests/test_course_settings.py
	cms/djangoapps/contentstore/views.py
	cms/djangoapps/models/settings/course_details.py
	cms/djangoapps/models/settings/course_grading.py
	cms/templates/edit_subsection.html
	common/djangoapps/mitxmako/shortcuts.py
	common/djangoapps/static_replace.py
	common/djangoapps/util/converters.py
	common/djangoapps/xmodule_modifiers.py
	common/lib/xmodule/setup.py
	common/lib/xmodule/xmodule/abtest_module.py
	common/lib/xmodule/xmodule/capa_module.py
	common/lib/xmodule/xmodule/course_module.py
	common/lib/xmodule/xmodule/discussion_module.py
	common/lib/xmodule/xmodule/error_module.py
	common/lib/xmodule/xmodule/html_module.py
	common/lib/xmodule/xmodule/js/src/video/display.coffee
	common/lib/xmodule/xmodule/mako_module.py
	common/lib/xmodule/xmodule/modulestore/mongo.py
	common/lib/xmodule/xmodule/modulestore/store_utilities.py
	common/lib/xmodule/xmodule/modulestore/xml.py
	common/lib/xmodule/xmodule/modulestore/xml_importer.py
	common/lib/xmodule/xmodule/raw_module.py
	common/lib/xmodule/xmodule/self_assessment_module.py
	common/lib/xmodule/xmodule/seq_module.py
	common/lib/xmodule/xmodule/template_module.py
	common/lib/xmodule/xmodule/tests/__init__.py
	common/lib/xmodule/xmodule/tests/test_export.py
	common/lib/xmodule/xmodule/tests/test_import.py
	common/lib/xmodule/xmodule/video_module.py
	common/lib/xmodule/xmodule/x_module.py
	common/lib/xmodule/xmodule/xml_module.py
	lms/djangoapps/courseware/access.py
	lms/djangoapps/courseware/courses.py
	lms/djangoapps/courseware/grades.py
	lms/djangoapps/courseware/models.py
	lms/djangoapps/courseware/module_render.py
	lms/djangoapps/courseware/tests/tests.py
	lms/djangoapps/courseware/views.py
	lms/djangoapps/django_comment_client/utils.py
	lms/templates/staff_problem_info.html
	lms/templates/video.html
	rakefile