Fix formatting
Fill in details for Code of Conduct

The number for AMA's venue security still needs to be filled in, but
these others are important so I wanted to get them filled in sooner than
later.

References #13
Add the venue's phone number

This was the last remaining piece of contact information for the Code of
Conduct.

Closes #13
Merge pull request #53 from PyGotham/code-of-conduct-details

Code of conduct details