Updates CI to v2.2, adds default config settings

@bparees Please review and merge
I'm guessing the rails 4 example just pre-dates the --from-code option (not sure how long that flag has been around, it pre-dates my tenure here).  --from-code seems nicer for a user than running a bunch of git commands to setup the repo...  but since it means codeigniter will start immediately, they'll have to have created the app with the DB gear (not add the db gear later) assuming codeigniter requires the DB gear be present.