override league_path and league_url to include hmac parameter
define league#hmac
only display league page if requested with the correct hmac key
move definitions of league_url and league_path so they also work in the controllers
simplify league_url method
don't duplicate methods in controller and helper
update gitignore
Merge branch 'master' into obfuscate_urls

Conflicts:
	app/models/league.rb
	spec/models/league_spec.rb
allow passing optional parameters to league_url and league_path
Merge pull request #20 from bretthuneycutt/obfuscate_urls

Obfuscate urls