Added installer script.
Updated README.md to point users to using the install script.
Updated git checkout to properly reflect what branch it should be checking out.
Merge branch 'multiple-branch-pull' of github.com:rbclark/popHealth-recipe into multiple-branch-pull
Added usage to install script.
Updated install.sh to actually be indented using spaces and follow conventions.
Merge pull request #1 from rbclark/multiple-branch-pull

Add installer script