Create script that a developer can use to clone repo

[tst-ccamp]

The script can perform several helpful steps

1. Write scripts for all platforms to install dependencies for OpenGEE (git lfs, set up yum repos, install libraries)
2. Expected workflow - user installs git (but not git lfs), user clones the repo, user runs the script which sets up git lfs, pulls lfs files, and does the other steps
3. Script should work on all platforms (one script per platform is acceptable)
4. Update build documentation to reference new scripts
5. Focus on getting something basic that works

Users would be able to set all of this up with a single command line they can paste from the build instructions page

[tst-ccamp]

Closing this in favor of #475