Reorder methods in importer.rb
Reorder methods in importer.rb

The `camelcase_to_snakecase` method is more like a utility, so I wanted
the more core method `find_path_to_file` to come higher up.

lencioni/import-js,flarnie/import-js,trotzig/import-js,Galooshi/import-js,lencioni/import-js,trotzig/import-js,trotzig/import-js,flarnie/import-js,lencioni/import-js