Issue #1222222 and #1222206 by nicholas.alipaz, vlkff: Make skype action configurable, make views empty skype id text configurable, and change settings storage.

fix an issue with the way a t() was formatted and start work on some views fixes for anonymous users

Complete rewrite of module to get it functioning again, then addition of views support for format of fields

Changelog:
- Implemented a hook_hook_info() trigger that fires when users' Skype status changes.
- Fixed bug in invocation of hook_skype_status().
- Changed incorrect usage of dc:valid to dcterms:valid.
- Updated module to take into account latest RDF API changes.

Retrieves users' Skype online presence information from Skype's public, RDF-based presence service.