Merge pull request #1 from ros/master

Updating to match main repo
Merge pull request #2 from ros/master

Synchronizing with master.
Updated the location of the source for the p2os stack.
Added more gentoo dependencies
Updated the location again
Fixed whitespace
Hm. I guess I'll just use the old location for releasing...
Updated p2os groovy version
...Oops
Merge pull request #1617 from allenh1/master

Updated the location of the p2os stack.