fixed bug calling process before assignment, added _download_name to fixed release installs
switched download_name and tar_name
bug fix
Merge pull request #106 from mjmottram/rattools

fixes for fixed release downloads
Fixed rattools issues.
Added gdml to root.
Merge pull request #108 from mbcole/gdml

Added gdml to root.
Added version 4.2.1 of rat.