Summary:

Add an extension for connecting Review Board to Sentry.io.

Review Request #10292 — Created Oct. 30, 2018 and submitted Nov. 16, 2018, 11:06 a.m.

Description

This extension makes it easy to catch errors from both the front- and
back-end and report them to a project on Sentry.io.

Testing Done

Connected my devserver and caused some errors to occur. Saw issues pop
up correctly.

Issues

Description	From	Last Updated
Indented one space too many.	brennie	Nov. 2, 2018, 3:43 p.m.
W391 blank line at end of file	reviewbot	Oct. 30, 2018, 11:05 a.m.

flake8 failed.

JSHint passed.

rbsentry/rbsentry/__init__.py (Diff revision 1)
Show all issues
```
W391 blank line at end of file
```

Ship it!

rbsentry/README.rst (Diff revision 1)
Show all issues
```
Indented one space too many.
```

Pushed to master (17879b1)

rbsentry/README.rst (Diff revision 1)