layout cleanup on LMS PDF Textbook viewer
adjusted the LMS PDF textbook zoom elements positioning
tracking in idashboard should only log json-serializable objects
use unicode instead of str for casting track.views args in idashboard
put block around main_vendor js in main_django.html

should be a no-op for edx-east, but allow edx-west to remove
vendor.js with a blank {% block %}
in our password_reset_confirm.html to fix a bug
drag_and_drop template added
updated imageresponse example to a more universal example (baby animals)
Merge remote-tracking branch 'origin/release' into rc/2013-07-16
Reinstate problem_check event as Problem Checked event
i18n the PDF prev/next button text
Remove unused code and include problem ID of data we send
Make jasmine tests quieter
Make DraftModuleStore mongo only

DraftModuleStore was originally designed as a mixin, but never used that
way, and with the upcoming changes to use the versioned module store,
never will be. This changes removes a circular dependency between
mongo.py and draft.py.
Update MathJax to the latest stable version (2.2), to fix IE10 bug LMS-194
Merge pull request #412 from edx/dave/ie10_mathjax_fix

Update MathJax to the latest stable version (2.2), to fix IE10 bug LMS-194
changed transifex project to edx-platform
Merge pull request #414 from edx/jtauber/switch-transifex-project

changed transifex project to edx-platform
Move defaults from yaml templates to field definitions.

This standardizes the XModule field default values to be the same as the
values that are presented by studio when a component is added to a
course.
No longer persist XModule templates

Instead, we use XModule field default values when creating an empty
XModule. Driven by this use case, we also allow for XModules to be
created in memory without being persisted to the database at all. This
necessitates a change to the Modulestore api, replacing clone_item with
create_draft and save_xmodule.
Change default rerandomize and showanswer

The defaults used to be rerandomize=always, showanswer=closed. This is
preserved for capa problems being imported from XML. However, for
courses, and for problems created in Studio, the default has been
changed to never/finished, to match the previous defaults used by
Studio.