Major Updates:

SelectiveGenomeAmplication:

remove need (again) for any temporary fasta file, instead do all parsing
in house with strstreamone and python

correctly get reverse compliment. a combination of tac and rev, not
just tac

add non_melitng and filtered_binding variables to bash for clarity and
to reduce clutter

score_mers:

This should speed up our loading and memory and probably each job since
there's less memory overhead.

revamp mer points
- remove class, save as arrays instead
- only allocate mers we need,
- don't bother getting counts

- reduce command line arguments
- use original fasta files now, so it's easier for a user to use (as per
	issue #5
- remove weird pop_fg/bg functions
- add one to total incase of zero div.