Merge pull request #41 from martinghunt/master

Bug fix to stop dying when reference sequence provided by user
update the default executable locations for the read correction and quasr
Merge pull request #42 from andrewjpage/update_manual_scripts_execs

update the default executable locations for the read correction and quasr
abs_path to inputs added
Merge pull request #43 from carlacummins/master

abs_path to inputs added
Added AUTHORS file
Merge pull request #44 from aslett1/master

Added AUTHORS file