Revert "Fix markdown bug multiple multiplechoice"

This reverts commit d6bb2bdaacd96f0bc6a50f66d8139e6f7aa52726.
Revert "Turn off capa name masking"

This reverts commit 951e4378c58a5e3f93b622b58c4d3518936d9c28.
Revert "Fix randomization bug for multiple questions per problem"

This reverts commit 0c583d9edbc2d1f75ec2fead2b3346b49ae13113.
Revert "Fix bug with multiple responses per problem"

This reverts commit f1151eebf46636c2bb3de6118a0a97476ca6c003.
Revert "Rename Check/Submit button for Stanford branch"

This reverts commit e32c27af15e4b149233421eb9685744bf338ff19.
Revert "HACK capa timed-test on capa_base.py"

This reverts commit 8e1ed5739c875f111d923f555e54d612a7a9affc.

Conflicts:
	lms/templates/problem.html
Revert "Multiple-choice features"

This reverts commit 377f91e90209df21e42c4db7d6a14717f4816c41.

Conflicts:
	common/lib/xmodule/xmodule/capa_base.py