fixes #2474 survey tab edit mode 500--just a typo
default share block to open on course home page
#2424 (columns in in-line quiz summary report are confusing)
Merge pull request #2479 from Stanford-Online/giulio-share-results

Default share block to open on course home page (closes #2477)
ContentGroup parents can be added as self parents

* Corrects overzealous exception thrown when ContentGroup parents were
  being added with add_child mistakenly.
Additional refinements to File ContentGroups

* ContentGroup handling for File objects refined to have safer handling
  around missing and self-parent cases. UI now disallows selecting
  self-parenting, and corrects self-parented refs that pass through it.
* (closes #2480)
Updated README_SETUP documentation

Updating setup documentation to reflect my (Nate's) setup today
on a fresh MBA running OS X 10.8.3.
Merge pull request #2484 from Stanford-Online/jrbl-contentgroup_parents_of_self

Jrbl contentgroup parents of self
Merge pull request #2481 from Stanford-Online/dca_copy_course_content

#2424 (columns in in-line quiz summary report are confusing)
Merge pull request #2475 from Stanford-Online/jbau-survey-edit-tab-fix

fixes #2474 survey tab edit mode 500--just a typo
course_materials: fix 500 error when no sections (fix #2486)
Merge pull request #2489 from Stanford-Online/sef-2486-course-materials-500-no-sections

course_materials: fix 500 error when no sections (fix #2486)
Merge branch 'master' of https://github.com/Stanford-Online/class2go into giulio-calendar