Fixes #12348 by updating rvm url

Per
https://developer.github.com/changes/2014-04-25-user-content-security/
raw.github.com is now served from raw.githubusercontent.com.
Fix url for git-pip.py

Per
https://developer.github.com/changes/2014-04-25-user-content-security/
raw.github.com is now served from raw.githubusercontent.com.
Adjust the salt-cloud docs for GCE SSH keys to make the example clearer
Remove unused argument
Merge pull request #12382 from terminalmage/issue12359

Remove unused argument
Merge pull request #12379 from hulu/githubusercontent-virtualenv

Fix url for git-pip.py
Merge pull request #12378 from hulu/rawgithub-redirect

Fixes #12348 by updating rvm url
Merge pull request #12381 from samkalnins/enhance_gce_sshkey_example

Adjust the salt-cloud docs for GCE SSH keys to make the example clearer
Update all raw.github.com references to raw.githubusercontent.com

Per
https://developer.github.com/changes/2014-04-25-user-content-security/
raw.github.com is now served from raw.githubusercontent.com.
Merge pull request #12383 from hulu/githubusercontent

Update all raw.github.com references to raw.githubusercontent.com
Remove reference to the short bootstrap URL
Use the new GitHub user content URL
Remove references to the insecure redirect.