Reorganize readme
Reorganize readme

Use text labels instead of numbered ones.
Use full URLs for documents.
Sort references.

carpet-berlin/web-scrobbler,alexesprit/web-scrobbler,carpet-berlin/web-scrobbler,galeksandrp/web-scrobbler,david-sabata/web-scrobbler,alexesprit/web-scrobbler,inverse/web-scrobbler,fakelbst/Chrome-Last.fm-Scrobbler,david-sabata/web-scrobbler,galeksandrp/web-scrobbler,inverse/web-scrobbler,fakelbst/Chrome-Last.fm-Scrobbler