Revert "Adds an example on how to use cloud-init with Nova and rackspace"

This reverts commit 6f75d5223458ecb1251bfcac812d1017e8ce49a6.
Compile examples with 1.7.1 and repair bit-rot
Update compute-basics example for GCE provider, support listimages, listnodes commands in compute-basics example
Removed all references to RestContext from Rackspace examples.
Updated broken links and license info
JCLOUDS-389: Updated license headers, broken links, and fixed minor whitespace issues
Revert compute examples back to use RestContext until Nova is unasynced