Remove .ctags file

Initially I was going to use ctags. Now I’m not, so the .ctags file has
been deleted.
Add a Nil grammar

For use when this package gets called on a file that is neither
CoffeeScript nor JavaScript. It essentially is a no op and never
matches anything.
Correctly name grammar spec files

Was `coffeescript-spec`, should’ve been `coffeescript-grammar-spec`
Open up entire test file

Added a new name generator just for running the entire file.