New version for SNP calls on bugaboo

- I noticed that several of the jobs on bugaboo were failing.  The
mistake I made was to scan the large file for the SNP each time, rather
than read in the relevant lines at once.  I wrote code to fix it, and
to re-run Bayenv2 based on whether the SNP was analyzed the 1st time
around in the 2nd environment file.
	- This means that I could have some duplicate SNPs in the 1st
environment file… will have to check BEFORE I stitch them back together.
	- May need to write a special script to see if all files have the
expected number of SNPs (20000)