Fixed bug 100, allowing scientific notation for coords, not returning INT_MIN for invalid numbers
Fixed bug133, missing intersection of zero length records
Read VCF struct vars length from SVLEN tag instead of using length of varRef field
VcfRecord code cleanup, add intersect unit test test for VCF SV's.
Merge pull request #139 from nkindlon/master

fixes for bugs 100, 133, 136