Added a XMFA parser to Heathpy (parse_xmfa)
first commit (function to parse id's and provide sequence name, start coord, and strand)
Added a function parse_coords that will produce a list of homologous postions

format:
['seq1_name:seq1_position', 'seq2_name:seq2_position',...]
for gaps, string is just '-'

something like this will produce the desired coordinate file:
for line in parse_coords(aln):
  print ", ".join(line)

THIS HAS NOT YET BEEN TESTED
Added basic tests for the main loop (parse_coords)
several bug fixes for parse_coords based on testing
Modified test XMFA file for easier testing of XMFA2coords.py, which necessitated changing the parser tests
Added code to run parse_coords and output results (as well as test)