Move proposal from Pull Request (#1163) for a FIBO financial extension into pending extension referencing this issue.

Text from PR:
This Pull Request constitutes a proposal for a FIBO extension to Schema.org from the Financial Industry Business Ontology Community Group.

This proposal builds upon the the new types and properties for the support of financial products and services introduced into Schema.org V3.0.

It introduces a first raft of new and modified Types and Properties to support in more detail the requirements for sharing financial products, services and organisations using Schema.org on the Web. This initial (v1.0) proposal has a focus on the area of loans, plus the addition of some more generally useful terms.

The proposal offered by the Group is based on the work of the Financial Industry Business Ontology project to extend the capabilities of Schema.org aligned with the Financial Industry Business Ontology (FIBO). This has been a team effort utilising the expert knowledge and know-how of members of the FIBO Content Team involved in creating the Financial Industry Business Ontology, working with others familiar with Schema.org including Mirek Sopek, and Richard Wallis.

More detail and links to the definitions in a test version of schema.org (http://fibo.sdo-fibo.appspot.com/) are available in the Group Wiki.