checking for group and keyname before we add a new ssh key
Merge remote-tracking branch 'org/testing' into check-for-keyname-group-in-up
merged with org/testing
writing back raw file contents instead of yaml so that we don't erase all the potentially useful comments in the AppScalefile
reloading appscalefile when we make changes to it
re-reading appscalefile if we changed it
Merge pull request #289 from shatterednirvana/check-for-keyname-group-in-up

Check for keyname and group in 'appscale up'