implement csv attendee list
fix broken link in events path
wrote test for csv generation, checks content type is csv, and checks filename is the default filename given by the controller
add spec to the end of the event requests spec
refactor the csv into registrations#index, change test, routes, controller, remove model method
require csv library for CSV generation, remove useless stuff from events controller, add csv generation method in registration model
use comma gem, change name of csv to data, pass argument without to_comma method, possible rails4/renderer issue, remove csv class method
Merge branch 'master' into csv
Merge pull request #94 from southpolesteve/csv

csv attendee