Completed minimum work example for LOFAR candidate generation. Needs to be tested.

Added required python code files from the presto library. These include:
1) polycos.py
2) infodict

Credit for these goes to those who wrote presto!
Completed minimal working example of LOFAR score generation code. Though not yet tested.

Had to add two code files from the presto library to make this work. These include:

1) polycos.py
2) infodict.py

Credit for these goes to the presto team.
Added new class to capture behaviour of original LOFAR score generation script.