Pingan Ren

Fixes #67 and #94. Now bounded length query like: ```sql -FROM GRAPH_TABLE (pg4 MATCH p = ANY SHORTEST (a:Point4)-[k:know4]->{2,3}(b:Point4) COLUMNS (a.id, b.id, vertices(p)) ) tmp; ``` will look for the...

Sorry, but I can not understand how to write proper code for this assignment. I did not find a clear answer either in the solution folder or in the issue....