Update about.html

added hosting rules
updated/improved readme and requirements.txt (commented out psycopg2)
Merge branch 'master' of https://github.com/aaronchall/nycpython.com
Added flask installation instructions for Mac OS
Update index.html

added details to the group's purpose
Merge pull request #13 from aaronchall/master

Improved readme for install and setup, commented psycopg2 from requirements.txt since requires postgresql server
Merge pull request #14 from six5532one/master

Flask installation instructions for Mac OS
Merge branch 'master' of github.com:NYCPython/nycpython.com

Conflicts:
	requirements.txt