Create embedded urls and support for url parameters

Can create embedded urls with protocol relative urls now.
Keep all url parameters in a params object.
Add parameters to created urls from the params object.
Refactoring so each format has its own function.
Renamed playlistId to list
Renamed startTime to start and moved it into the params object
Renamed playlistIndex to index and moved it into the params object
Long is the default format now
Sort parameters so they always stay in the same order (easier to test)