Add ability to transform_path for the core API config.

The `path` element of the swagger DSL `{"apis": [{"path": ...}]}`
allows a distinction between the API docs server and the hosted API
location (see https://github.com/wordnik/swagger-core/wiki/No-server-Integrations ).
This adds the ability to provide a custom transform function to swagger-docs which
can arbitrarily modify the currently-autogenerated `path` variable.
Update docs.
Merge branch 'add_transform_path' into internal

Conflicts:
	README.md
Add suport for Swagger models.

https://github.com/wordnik/swagger-core/wiki/Datatypes#wiki-complex-types
Merge branch 'internal' of github.com:scienceexchange/swagger-docs into internal

Conflicts:
	README.md
	lib/swagger/docs/generator.rb
Fix bug with not having any models declared
Spacing.
Update docs.
Add missing impotent method.
Merge pull request #25 from scienceexchange/add_models_support

Add support for Swagger model definitions.