pass any aditional args to L.tileLayer
camelize option keys
added tests
Merge pull request #28 from reignmaker/master

Pass any aditional args to L.tileLayer
Add configuration for tile layer subdomains
Merge branch 'master' of https://github.com/asmaloney/leaflet-rails

* 'master' of https://github.com/asmaloney/leaflet-rails:
  Add configuration for tile layer subdomains

Conflicts:
	lib/leaflet-rails/view_helpers.rb