Clean up survey warnings

Add hero to main.html and use it in program page

Adding hero to main.html allows for full width marketing images to be
used. This commit includes the addition of the hero block into
main.html along with the program marketing page's use of that new
hero block.

Specify the full path to the verify_studen app config

PLAT-1766 Upgrade django-cas for Django 1.11 compatibility

This fixes a bug introduced in 3be0fa81

ENT-735: Enterprise version upgrade to 0.53.5

Exclude .tox directory from quality checks

Move verify_student signal registration to ready()

Replace SubfieldBase functionality PLAT-1411

Complete scored blocks

Update enterprise version to `0.53.4`

Update translations

Exclude bumper from VAL handling the transcripts

add logs to better understand course listing response time

Fix Show Answer button display for the value "Answered" in studio

Dry schedule tests

EDUCATOR-1542 give access to Special Exam tab to the course team