Add sublime-style ctags files to gitignore
Move JSON serialization logic into single module

This is to prepare for the addition of the reverse
process: parsing relations from JSON, in service of
a 'sandbox' API endpoint.
Add Relation.fromJson
Add session middleware

This is a connect middleware function that attaches
a monarch repository to every request.
Work around bug in snockets concatenation order
Don't duplicate prototypal properties when cloning tables
Make #isEqual use components' #isEqual methods
Add Table#isEqual
Add combined session and sandbox middleware