Elasticquery

+ Add Python 3 support

+ Add support for all full text kwargs

v3

+ Full ES 2 DSL support
+ Removed `Filter` & ES 1 support
+ Exceptions renamed/reduced in favour of `ValueError` where possible
+ 100% test coverage

+ Add suggesters support with `ElasticQuery.Suggester`
+ Move docs to rst based/move to ReadTheDocs (when they fix their shit)

+ Format dates as isoformat when JSON encoding
+ Capture where non-EQ types are passed incorrectly

+ Raise a `MissingArg` exception for missing fields

+ Fix not filter(!)
+ Add `Query.function_score`
+ Add dsl support for lists of strings
+ Large documentation update