Changed str->unicode in common/djangoapps/utils/.

LMS-2436
Some more str->unicode fixes in instructor and courseware apps.

LMS-2429
Revert to older version of TinyMCE.

We had trouble with Cloudfront/hashed files and need more time
to investigate.
This reverts commit e8f53ac9dc6d8a1d9928787635c7c5f7e409a9ec.
Merge pull request #3067 from edx/christina/revert_tinymce

Revert to older version of TinyMCE.
Merge pull request #3070 from edx/adam/middleware

wiki middleware fix (LMS-2461)
Concept added to Studio advanced components
Help paver find the theme directory
Merge pull request #3075 from edx/db/paver-find-theme-dir

Help paver find the theme directory
fix paver theming on devstack (SERVICE_VARIANT support)

When running in devstack, you need to set the SERVICE_VARIANT so that
assets.py knows what environment file to use.  Recall that in devstack
we have all our settings in ../lms.env.json, not just ../env.json.  So
you need to run like this:

    SERVICE_VARIANT=lms paver lms --settings=devstack

Previously you'd get this error:

    Warning: could not find environment JSON file at 'lms.env.json'

Note there is no path on the file, that's the bug.  By making
self.REPO_ROOT absolute, we can walk up the tree and correctly find
the file, which is /edx/app/edxapp/lms.env.json fwiw.
Merge pull request #3081 from edx/sef/paver-fix-devstack-theme

fix paver theming on devstack (SERVICE_VARIANT support)
Skip collectstatic when falling through from rake assets:coffee
Properly get lazily translated exception message
Merge pull request #3083 from carsongee/cg/git_export_lazy_translation_fix

Properly get lazily translated exception message
Release notes 3/26/14

DOC-196
Merge pull request #3069 from edx/markhoeber/documentation/doc-196

Markhoeber/documentation/doc 196

Release notes for 3/27/14
Merge pull request #3082 from edx/db/rake-coffee-to-paver-skip-collect

Skip collectstatic when falling through from rake assets:coffee
Update testing.md file.

How to run Python tests for stub servers.
Merge branch 'release'
Fix failing tender.
Merge pull request #3092 from edx/valera/fix_tender

Fix failing tender.