Added callLookup.py: demos of how to query the index for function calls.
added a 'getLocationRow' step, which is useful to output the location of functions matching a traversal.
Started work on CallGraphCreator to add a callgraph once all code has been imported.
More work on call graph: Iteration over all functions in the index, lookup of callees.
Callgraph is now also created to allow interprocedural analysis without manual index lookups. The callgraph is not yet created by default as I still want to test this code thoroughly.