Added more complete where support, added basic order by support, added support for contains/like, more unit tests. Basic support for multiple where clauses.
Added initial support for multiple orderby. Added support for by descending as well as ascending (which was implicitly supported before)
Add initial support for WhereMissing. Added a bunch more tests. Added support for adding custom extensions via a custom IQueryParser which takes a custom Node Registry.
Some cleanup. Added more where tests, specific select tests. Added some comments for clarity.
Removed dependency on Remotion lib. Added Take and Skip tests (Offset and limit). Added basic offset and limit support.
Merge pull request #5 from SamFold/master

Where + WhereMissing