Added etc/x_pseudoautosomal.txt
Added x_pseudoautosomal.txt to config install
Fixed typo in ini_files
Incremented version to 0.7.3
Merge pull request #92 from iainrb/devel

Bugfixes and version incremented to 0.7.3
Merge pull request #93 from wtsi-npg/devel

Merge changes for release 0.7.3