Allow nested output path, if path does not previously exist.
Merge pull request #1872 from rwjblue/allow-nested-output-path

Allow nested output path, if path does not previously exist.
Pass through entire path when proxying

When using the proxy blueprint a request to `/api/posts`
would send the request as `/posts` to the proxied server.
This updates the proxy blueprint to prepend the proxy base on
proxied requests.
Update changelog for http-proxy generator
Merge pull request #1874 from tstirrat/proxy-path-passthru

Pass through entire path when proxying