add new tab file

Don't run collectstatic on course content

FAQ update for the embargo restriction

adding exporting of tabs and custom_tags. Also added unit tests

Updating FAQ text

pearson_dump: prettify, add missing error, provide default filename

support reordering of static tabs in studio

rename method to something that actually better reflects what it is doing. Also rename a variable to help with readability

rework redorder tabs so that we account for the fact that static tabs can be in any arbitrary order (with respect to non-static tabs) when working with an imported course

Catch save error and throw it in the user's face (bug 147). 

a server error and pull the server error handler into a common function.

Bug fixes for problem progress not updating.

fix copy+paste bug.

add unit test to test DraftModuleStore.get_items() fix

add comment on draft store test which explains test success is just for get_items() not to throw an exception when passed in a course_id

don't hard code the ordering of the tabs in the test. Take the current ordering defintion (in the test data) and reverse it