Add glossary command to bot

[nehayward]

Adds the command glossary to bot.

Features

• [x] Unit tests
• [x] search glossary (default 10) count
• [x] define glossary !glossary define dog is cool
• [x] rm glossary !glossary rm dog is cool

Possible changes

• Add shorthand for commands, and add remove to sub commands

[zpatrick]

< I fixed the merge conflicts since they were caused by me >