Update samtoolsWrapper.pyx

Add DS field for @PG tag (error reported by Quang Le)
VCF Validation

Includes some basic VCF validation
Increment version. Avoid problems caused by long reads, by capping maxReadLength
at maxSize.
Merge pull request #18 from dancooke/VcfValidation

VCF Validation
Merge pull request #16 from hangphan/patch-2

Update samtoolsWrapper.pyx
Added #!/usr/bin/python in Platypus.py so it can be run as an
executable.
Moved inline extract* functions to align.h and made them static inline. Hopefully this
will get rid of the build error on Mac OSX.