Picking off some of the easy README typos.
EUCA-7171 restore security context for created authorized_keys
Merge pull request #5 from kosch/EUCA-7171

EUCA-7171 restore security context for created authorized_keys.

Thanks @kosch.  Merging and will update the CentOS and OpenSUSE images with this.
Added conditional checks to keep authorized_keys files from growing - EUCA-7170
Merge pull request #4 from risaacson/typos

Picking off some of the easy README typos.
Merge pull request #6 from eucalyptus/rclocal-fixes

Added conditional checks to keep authorized_keys files from growing EUCA-7170