Update README.md

Updates README to current installation configuration requirements.
Update README.md
Update README.md
Update README.md

Removes unused section from readme.
Update README.md

Removes non-applicable parts of contribution section of readme.
Updates README

Sets source directory to code for america.
Merge branch 'master' of https://github.com/anselmbradford/trails-mobile

Conflicts:
	README.md
Merge pull request #62 from anselmbradford/master

Thanks Ans! 

Updates Readme to current installation requirements.