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Fix/cdodge/update localdev setting for unsafe courses

Jonahstanley/refactor unittest courses

Remove use of keyword "delete" in forum coffee code to fix IE8 bug LMS-441

Unskip Acceptance Tests

seems like we need to define COURSES_WITH_UNSAFE_CODE in cms.envs.common.py, although cms.envs.common.py imports lms.envs.common (where this is defined).

adding option for file based backend

Fix course team JS to handle non-200 status codes

Also fixed things in the toy course where needed

Factories were used when possible but tests depending on importing or things not manageable by factories used the toy course.  New files were added to include the needed functionality.  Most files are blank or have minimal xml needed to work

A blank asset file was also added to toy

This fixes the following tests(T stands for toy, F stands for factory made):
T import_textbook_as_content_element (needed to add a textbook to toy)
F static_tab_reordering
T import polls (needed to add a poll to toy)
T xlint_fails
F delete
T about_overrides (needed to add an about override to toy)
F remove_hide_progress_tab

Change client-side code references from "delete" to "_delete". Some of these
were method names (or would generate method names), which breaks in IE8
because "delete" is a JavaScript reserved keyword. foo["delete"] is ok, but
foo.delete is not. This also makes forums marginally functional in IE8,
though the left-nav still has some display issues.

Parameterize aws s3 bucket name for forum uploads

Jonahstanley/acceptance tests unique database

Add support for Vagrant install, and switch from RVM to rbenv

This explains why acceptance_static is used

Acceptance_static is used to prevent collect static from using a seed
test.py had its seed removed due to redundancy

Update SASS and Bourbon, add Neat

change log levels on the delete course utility. Otherwise they get filte...

tracking in idashboard should only log json-serializable objects