Fix SQL query to use indexes in the page table
Clean titles before querying the DB
Decided returning a single relationship type per plugin is a bad idea
Fixed call to Relationship constructor
Cleaned and Fixed Modules sent to the Workers

Most modules that were being sent were not needed because they should be
in the Python path, that should be something to take care at the
deployment phase.
Fix imports to be able to import properly from the worker nodes
Fixed inherited constructor call
Implemented DB connection parameters through defaults file
Return value of get_result is a pair of (task, result data)