posting relationships now checks schema
added docs for schema, closes #10
actually commited the tests... #10
added compound edges (able to query for them)
allows /node/node_id for where you don't want type checking on node_type
some api edge refactoring

Signed-off-by: Ben Shaw <benshaw9@gmail.com>
wiki updates

Signed-off-by: Ben Shaw <benshaw9@gmail.com>