Add PrettyDialect
Fix issue where aliased column names containing whitespace were parenthesized
Rework gesundheit.engine
Browserify WIP

Queries and nodes now support a to/from JSON interface allowing them to be
compiled to a datastructure on the client.
Add sql_keywords.json
Basic marshal/unmarshal architecture with pluggable validator
Re-structure (un)marshalling of objects
Don't bother quoting sql keywords in the browser

If you're executing sql strings from the browser directly, you have bigger problems
fix bug with query object not being passed to visitor functions
Update browserify dep
Add try-in-your-browser to docs
Fix loading of sql_keywords.txt on newer versions of node