foursquare/rogue — pull request #50 by nsanch (2012-03-12 22:46:20+00:00)
Title: move comparison operators up to AbstractQueryField

The documentation on comparison operators at
http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%3C%2C%3C%3D%2C%3E%2C%3E%3D
doesn't list any restrictions on what types can be compared. For any
type that can be indexed, mongo must be able to do comparisons on that
type, and so these comparators should work.