Added payswarm.com website as it stands right now.
Added rough first draft of Web Identity specification.
Minor change to the JSON-LD identity example.
Minor updates to in-scope functionality for Web Identity spec.
Added potential actions on a web identity in the spec.
Added examples of reading an identity using HTTP Signatures and POST.
Fix links and references.

- Use https://web-payments.org/ base.
- Update to link to secure-messaging spec.
- Use AES vs FIPS-197.
- Fix typos.
Factor out common respec JS.

- Create web-payments-common.js for common respec JS:
- Common preProcess function:
  - This was repeated everywhere.
- Common localBiblio data:
  - Remove JS breakage from old unused "berjon.biblio" access.
  - Much easier to manage similar references in one location.
Updated Web Identity examples based on 2014-02-05 telecon discussion.
Fix typo.
Changed 'assertion' to 'credential', and 'endorsement' to 'claim'.
Fix typo.
Revised abstract to be more succinct.
Update old terminology "assertions" to "credentials".
Added a Web Credential-based login mechanism to the spec.
Change "signer" to "creator".
Updated credential-based login based on 2014-03-05 telecon.
Renamed "Web Identity" spec to "Identity Credentials".
Updated Identity Credentials spec based on community feedback.
Add basic credential creation and interactive flow diagrams.