added initial skeleton for add_keypair
moved shell to LocalState, and added comment with ruby add-instances to work from
not calling add-keypair via shell, but calling lib directly
generating rsa key for virtualized cluster deployments
merged in run-instances-in-py
fixed code/tests for generating rsa keys
finished first pass on add-keypair
fixed how we name public/private keypair so that ssh-copy-id will accept it
merged master into add-keypair-in-py
put in location of expect script as constant, and printing errors in red
merged from org/testing
Merge pull request #106 from shatterednirvana/add-keypair-in-py

appscale-add-keypair in Python