Wording for batch beta email add with autoenroll (LMS-2551)
set reasonable SERVICE_VARIANT based on command line; ensure theme passed to coffeescript also;
remove theme_paths var, per @sefk
fix class var; set SERVICE_VARIANT to lms by default if unset (helps "paver --help" work cleanly)
Merge pull request #3094 from yarko/yarko/fix-paver-env-assets

ensure SERVICE_VARIANT set; pass theme to coffeescript;
BLD-717: MultipleChoiceResponse i18n.
Merge pull request #3414 from edx/anton/i18n-choice-response

MultipleChoiceResponse i18n.
DOC-264, clarify that students can opt out of email
Merge pull request #3407 from edx/ahodges/documentation/DOC264

Ahodges/documentation/doc264
Merge pull request #3397 from edx/sarina/lms-2551

Wording for batch beta email add with autoenroll (LMS-2551)
DOC-279, correct add discussion category steps

also removed "static" for pages