* submodule docs are now located at /api/yaml/<name>.html instead of
/api/<name>.html.
* can now simply link to symbols in other modules.
* fixed some links
* fixed quickstart example list
* added quickstart item displaying the new style api
* fixed a bug in presenter that doubled a line in literal/flow style
* Updated changelog, readme and nimble file
* moved nimble file from nimyaml.nimble to yaml.nimble because
the nimble package has been renamed
* Updated documentation about nimble package
* renamed setTagUriForType to setTagUri
* generated TagId is now const (can be used in case etc)
* Uses compile-time counter independent from tag library