Update email messages associated with Proctoring states

See PROD-1073 for details.
We are updating the email messages with different contact_us links on this version.

Fix bug on edx-proctoring InstructorDashboardView

In this release we fixed a problem where the InstructorDashboardView would not return the right dashboard if the last exam setup for the course is not proctoring enabled.

Match npm and pypi versions.

Merge pull request #632 from edx/feanil/bump_version

Bump both versions to match.

Release 2.1.8: Fix Python 3 Error

Fix doc signing bug for python 3.

Fix Python 3 Error

Crypto keys need to be bytes in python 3.5

Fix Python 3 Error

Fix Json loading of the app in python 3.

2.1.5

Bring edx-proctoring into compliance with OEP-30:

• Adds a pii_check make target.
• Adds PII annotations to models.
• Adds a travis build step to execute the pii_check target.

Release 2.1.4

• Updating Requirements
• minor modifications to some migration files

Release 2.1.3 : Python 3 Support

Python3 Compatibility.

Release 2.1.2

Do not let learners re-attempt exams once they have started them.