add leading slash to the jsi18n include

Feature/nate/updated dev env setup

In order to avoid duplicating the Ruby version between the `.rvmrc`
and the `.ruby-version`, we'll get rid of the `.rvmrc` and use the
`.ruby-gemset` file to specify the gemset. These files are supported
by RVM as documented [here](https://gist.github.com/fnichol/1912050).

This way, packages won't be inadvertently installed into the wrong
virtual environment. I tried to have the check just run `deactivate`,
but I couldn't figure out how to get that working, so the script
just bails.

* Script now installs RVM in conventional location (~/.rvm) by
  default, though it allows for the override if desired. This will
  enable folks to install edX alongside other Ruby projects also
  using RVM.
* Script now uses virtualenvwrapper to ease the process of enabling
  the edX virtualenv and to allow for easy switching back and forth
  between virtualenv projects. It now also installs the "mitx"
  virtualenv in the conventional location of ~/.virtualenv.
* Adding a .rvmrc file so that the Ruby environment will be
  automatically activated (via `rvm use`) whenever the user hits
  the `mitx/` directory.

Fix/cale/lms jasmine tests

Fix/btalbot/studio courseinfo

Ned/personal requirements

Add a private-requirements.txt for personal changes to how things are installed.  Good for installing libs as working dirs.

Change xblock version.

Add leanModal vendor src to files.json for cms jasmine tests. Also .gitignore compiled js from coffee specs

add more images to support templates

add dependent image for the image response template

fix bad url for jsi18n

Add accessibility text to the Contact page.

Fix/sarina/new formularesponse defaults

fix broken test. Since we're pre-populating the course overview when creating a course, the clone_course fails because it asserts that the destination course that it clones into is empty. Need to check that the course is basically empty (e.g. a course module and a overview module)

Feature/straz/i18n - rake tasks to generate strings