seroWY doesn't handle gaps

[kwongj]

If there are gaps in the assembly, unable to translate sequence:

$ meningotype --all fasta/NM_NM115.fna 
SAMPLE_ID	SEROGROUP	ctrA	MLST	PorA	FetA	PorB	fHbp	NHBA	NadA	BAST
Traceback (most recent call last):
  File "/home/jasonk1/scripts/bin/meningotype", line 11, in <module>
    load_entry_point('meningotype==0.8b0', 'console_scripts', 'meningotype')()
  File "/home/jasonk1/.local/lib/python2.7/site-packages/meningotype/meningotype.py", line 504, in main
    seroCOUNT = '/'.join(seroTYPE(f, seroPRIMERS, allelesDB))
  File "/home/jasonk1/.local/lib/python2.7/site-packages/meningotype/meningotype.py", line 154, in seroTYPE
    sero = seroWY(f, sero)
  File "/home/jasonk1/.local/lib/python2.7/site-packages/meningotype/meningotype.py", line 160, in seroWY
    wyTYPE = menwy.menwy(f, False)
  File "/home/jasonk1/.local/lib/python2.7/site-packages/meningotype/menwy.py", line 60, in menwy
    EX7E = str(EX7E_SEQ.translate())
  File "/home/jasonk1/.local/lib/python2.7/site-packages/Bio/Seq.py", line 1025, in translate
    cds, gap=gap)
  File "/home/jasonk1/.local/lib/python2.7/site-packages/Bio/Seq.py", line 2098, in _translate_str
    "Codon '{0}' is invalid".format(codon))
Bio.Data.CodonTable.TranslationError: Codon 'AT-' is invalid