updated pinning icons
Added tests for capa input templates.  This includes tests
for HTML we expect to be unescaped.
Start making comprehensive calc tests
Finish calc.py tests; add docstrings, etc
Enable coverage for calc module; split off tests
Fix advanced modules list.
Sandbox-installed packages will be really installed instead of -e installed.
changes to refactor local requirements.
Merge branch 'master' into ux/marco/forums-icons
Add docstrings; test divsion by zero at Response level
Pep8 fix
Merge branch 'master' into pbaratta/calc-tests
resolved confict based on change branching later than the live hotfix branch
Fixed docstrings and other comments from PR review
Add few more tests; fix a small bug with parallel resistors
Added videoalpha version 1 to the advanced components in studio.
standard video introduction
different default section
removed from and to labels
changed 'from' and 'to' to 'start_time' and 'end_time'