Encrypt the session id before writing to tracking logs.
Also use md5 for constructing key for hmac.
Update ddt to 0.8.0
Fixes BLD-1104
Extract i18n strings from *.underscore files using django-babel-underscore
Improve escaping in code response.
Add additional tests for tracking of sessions.
Removes Conrad's name from the course schedule settings (STUD-1511).
Extract i18n strings from *.underscore files using django-babel-underscore

Change strings from mako.po into underscore.po, which is finally merged into djangojs.po.
prevent caching of GET requests for xblock student view
STUD-1691
Fixes delete page confirmation text.
Don't show duplicate JIRA tickets in the release PR table
Merge pull request #3962 from edx/dcs/BLD-1104

Fixes BLD-1104
Merge pull request #3980 from edx/benmcmorran/remove-conrads-name

Removes Conrad's name from the course schedule settings (STUD-1511).
Merge pull request #3977 from edx/zub/bugfix/std1691-IEeditannouncement

prevent caching of GET requests for xblock student view
Merge pull request #3979 from edx/benmcmorran/delete-page-confirmation

Fixes delete page confirmation text.
Merge pull request #3971 from louyihua/django-babel-underscore

Django babel underscore
extract from underscore files under cms, lms, and common

to avoid extracting from test_root and such
Merge pull request #3707 from edx/db/release-script-no-duplicate-jira

Don't show duplicate JIRA tickets in the release PR table
Don't search for underscore files under lms