Remove unused function
Centralize when json parsing of responses from controller_query_service happens
Fix a decode error in course_about.html and make some string translatable

The strings in share links should be in unicode, otherwise when the name of a course is non-ascii, it will generate a decode error.
And some of these strings is actually translatable, so they should be collected into mako.po.
Collect metrics around the open_ended_grading controller_query_service
Correctly catch RubricParsingErrors
Make GradingServices always return dictionaries, rather than sometimes returning strings
Record metrics about the peer grading service
Record metrics about the staff grading service
Actually push json parsing all the way down to the bottom of the GradingService get and post methods
Merge pull request #3119 from louyihua/translation-fix

Fix a decode error in course_about.html and make some string translatable
Merge pull request #3091 from cpennington/ora-metrics

Add metrics around old ORA requests
Capture metrics for problem attempts and histograms of problem grades
Make new-style chinese language codes works for translation

The old-style chinese language codes used in django 1.4 series are now deprecated, as discussed here:  https://code.djangoproject.com/ticket/18419.
Although majority of browsers still use the old-style language codes, some new browsers such as IE11 in Windows 8.1 start to use the new-style names instead of old-style ones which makes the current chinese translations of edX can't work properly under these browsers.
As there is no easy way for edX to change a higher version of django, I think we could do some mapping here so that the users who use IE11 in Windows 8.1 or other browsers that use the new-style names can view correct translations.
Also, this fix will make users who use one of the language codes:  zh-hk ,  zh-sg  and  zh-mo  can see the correct translations.
Merge pull request #3162 from cpennington/problem-check-metrics

Capture metrics for problem attempts and histograms of problem grades
Merge pull request #3148 from louyihua/localization-fix

Make new-style chinese language codes works for translation
Instructor- and student-facing documentation for ORA2
Merge pull request #3044 from edx/sylviapearce/documentation/DOC-191

Sylviapearce/documentation/doc 191
Temporarily disable studio acid block tests that are failing
Merge pull request #3174 from edx/zoldak/disable-acid

Temporarily disable studio acid block tests that are failing
Upgrade to TinyMCE 4.0.16.

Detailed commit messages:
deleted old tinymce

new tinymce
js changes to support new tinymce
scss changes for alignments

Include all the controls on the toolbar that we previously had.

Changes to support Bulk e-mail usage.

adding new studio skin for TinyMCE4

Get handling of static image links working again.

Delete old Studio skin.

Version 1.3 of CodeMirror plugin.

Modify paths for location of CodeMirror files.

Fire events when CodeMirror Editor is open and closed.

Needed to switch static links back and forth.

Remove CodeMirror tabbed editor.

fixed tinymce visual editor css

Change how we detect that an image has been inserted.

made the codemirror look more studio-like

reordered the tinymce buttons

Update unit tests.

Update acceptance test for image plugin.

Make sure to strip out temporary caret.

It can get left behind in style blocks.

Test for style block being maintained.

Allow TinyMCE to create p's, else formatting doesn't work.

Add tests for toolbar buttons and converting links.

Add test for code format toolbar button.

Remove unnecessary code.

Remove unused testing templates and unused tabs.

Update tinymce paths.

Fire an event with the link plugin closes so we can rewrite links.

pep8

Updates from code review.

Change the name of the button to "Edit HTML".

Changed menu name for consistency, but we don't show it.

Changed name of "code" toolbar button to "Code block".

Switch from tabbed Visual/HTML Editor for HTML modules to showing the code editor as a plugin within TinyMCE (triggered from toolbar). STUD-1422

Fire events before and after the image dialog is shown.

We use this to rewrite links.

Change the event handling for image plugin.

Fixes FireFox bug, and allows us to correct the image path when we show the plugin (as opposed ot only correcting path when we close the plugin).

Code review feedback.

Fire events before and after the link dialog is shown.

This allows us to convert the static links.

Remove unnecessary helper method.

keeping the component editor inside the component window

Use compressed CodeMirror file.

replaced code icon in TinyMCE editor; simplified UI on TMCE toolbar

Change code editor icon to say HTML.

Move code style block button.

Update tests for minor UI changes.

Code editor button no longer shows an icon, and code style toolbar button location has moved.

Fix typos.