Added named query parameters instead of '?'s
Added the option to name params to set them later

- first step in cachable/reusable/extendable queries
Updated to version 2
Added extra javadocs/changed api slightly
javadocs
Added tostring
Removed null validation

- Removed because it is more useful to be able to inspect the query string than it is to get the exception slightly sooner
Merge pull request #15 from gert-wijns/NamedParams

Named params