Add emperor to the dependencies list

Add the emperor git repository so people can start using it right away
when they install QIIME.
Merge pull request #53 from ElDeveloper/emperor

Add emperor to the dependencies list
Adding galaxy and qiime-galaxy
Fixing Galaxy release-file-name
Fixing Galaxy version
Fixing Galaxy installation
Merge pull request #54 from josenavas/add_galaxy

Added Galaxy
Added conf files for QIIME 1.7.0 and 1.7.0-dev
Merge pull request #55 from jrrideout/170

Added conf files for QIIME 1.7.0 and 1.7.0-dev