Pull in a JS util lib like Underscore.js?

[ehaughee]

Things I see we could use:

• without - remove users and rooms from the arrays
• random - to generate random numbers for building room names
• Maybe uniqueId - to generate whole room numbers but I'd have to look more into how this works or could be modified
• escape - might be able to replace the sanitize package dependency if we're adding this already.
• contains - various array content checks

Seems like from this list it might be worthwhile to pull this in and reduce new code.