Merge pull request #67 from wtsi-npg/devel

Devel
Merge pull request #69 from wtsi-npg/devel

Devel
added homopolymer to error analysis
mods for quality based calibration
homopolymer added to error analysis
Merge pull request #70 from srl147/devel

Devel
Merge pull request #71 from wtsi-npg/devel

Devel
Merge pull request #15 from wtsi-npg/master

update