Expand the filtering in Graphql

[miratepuffin]

As from #1037 we have some basic filtering of nodes in graphQL - selecting in/out degree less than/greater than a given value and checking the value of names/node type.

This can be expanded in multiple ways - to name a few:

• The edges, and neighbours could have the same filters available.
• The user could also be able to filter all of these types by properties.