Update setup.py script

Bumped up the minimum required version for QIIME, this comes as a
requirement after #92 was merged.

Some strings were updated and the ChangeLog was updated to reflect this.
Merge pull request #142 from ElDeveloper/setup_update

Update setup.py script
Merge branch 'master' of github.com:qiime/emperor into screenshot

Conflicts:
	ChangeLog.md