Move parseActions and statics out of evaluator()
Simpler pyparsing
Add docstrings and comments
Rename variables; get rid of OPS
Set numpy so it does not print out warnings on student input
Replace /faq route in LMS urls

This route was mistakenly removed by the theming changes since the
"FAQ" marketing link actually points to help_edx, not faq_edx.
Move string fields, get rid of hard-coded list of booleans.
Add test for serialize/deserialize.
Additional test coverage.
Get rid of unused code
Make Jenkins test the calc module
Added tests for new math functions
Add support for various math functions in calc.py.
Add variable i as an imaginary unit
Update version of xblock.
encoded URL to fix formating
Fix broken lettuce tests
Default to unicode for sass compilation.

If no default is provided, sass falls back to the system
default. This fails when the system default is not unicode because
various sass files have unicode characters in them.
Adding a new env to handle escalating privileges to run db migrations.
(cherry picked from commit d2554909d8d67a58c962a693ef3b3e5a0d3f3ee8)
Better error handling.
(cherry picked from commit 1511ec841a30a7a8adbec2d700502a1e685f6103)