* Added support for setting Galaxy port to something other than 8080
* Added support for creating Galaxy system user
* Cleaned up wording used if Galaxy version differs from latest in upstream repo
* Cleaned up wording about install DRMAA module for python
* Changed the default for galaxy system user's home directory so it doesn't need to be under /home
* Propogated galaxy_port setting to the nginx config
* Documented new variables in README.md