integrate Sentry for error logging

[rahulbot]

The ML will be setting up a Sentry server in house. We should integrate it so that error-level logging gets sent there.

[rahulbot]

I think you misunderstood this. We want to use Sentry to capture server errors. So you need to install the python module and set it up to automatically capture any exceptions and error log messages.

[elplatt]

OK, I changed this. Theres a spot in the app.config to add the sentry DSN key now (see app.config.sample).

[rahulbot]

any tips on how to generate an error to test this?

[rahulbot]

nevermind, I got one!