Fix failing grade label being editable but not saved.

Incorporate Anant's suggestions

Use calc's evaluator for staff answers in `Numercial` type

Sync up Reset Action Button Styling for Capa xmodules

address some pylint violations in the mixedmodulestore build report

Add doc strings and fix spaces

on import, when enumerating through the 'draft content', OSX environment...

Fix/cdodge/get items needs courseid

don't put the substitutions in quotes

on import, when enumerating through the 'draft content', OSX environments will have hidden binary encoded quarantine files. We don't want to try to process these as they will throw an exception when trying to be parsed. It's harmless - the import goes on fine - but it's a lot of clutter in the output logs.

small change in aggregating peer eval grades (rounds up)

Jonahstanley/help acceptance test

set first FAQ link to mktg webiste too

Persist static_tab name.

STUD-663.

Change pylint settings to not report in importing assert_* from nose.tools

Make sure to persist static tab name assignment.

STUD-663

Pylint updates.

Rather than just calling `complex(...)` on the staff answers, also call
`calc.evaluator`. This way, simple things like `1/3` can be entered, as well
as more complicated explicit equations (e.g. `sqrt((12^2 + 26^2)/2)` etc, etc)

Simplify and update the tests to work with this.

Jkarni/fix/quietdocs

fixes delete state on dashboard

Location to/from locator mapping facilities