Merge pull request swagger-api#947 from swagger-api/develop_2.0

updated client for remote ref support

updated version

rebuilt

rebuild

test for swagger-api#932

Merge pull request swagger-api#925 from swagger-api/feature/legacy-cl…

…eanup

Feature/legacy cleanup

updated client, version

Merge pull request swagger-api#901 from swagger-api/issue-899

added operation type checking, write header to library, updated client library

updated badge