removed encoding line

turns out that this line is not recommended:
http://legacy.python.org/dev/peps/pep-0008/#source-file-encoding
Add generators file to list generators in EvtGen

this file should contain all generators used in the source decay file,
i.e. DECAY_2010.DEC
add first version of the sanity checking script

this script so far takes the workfile created by extract_decays and
creates lists of the decay products.