remove blueprint generation from readme
remove blueprint generation from readme

The blueprint is gone now that this package is npm-only.
martndemus/ember-cli-font-awesome,martndemus/ember-font-awesome,martndemus/ember-font-awesome,martndemus/ember-cli-font-awesome,lfridael/ember-cli-font-awesome,lfridael/ember-cli-font-awesome