Merge pull request #77 from STRML/master

Swagger: Don't show derived parameters in param lists.
swagger: fix filtering of non-settable args

Before this change, all arguments with custom `http` configuration
were filtered out.

This change fixes the filter to exclude only parameters computed using
a custom function and parameters set to the incoming http request.
Merge pull request #78 from strongloop/feature/fix-param-lists

swagger: fix filtering of non-settable args
Fix typo in doc link
Fix typo