Rewrite DartHtmlHttpService to not use HttpRequest.request().
Remove missed section of code.
Stray capital L in library.
Missing (.
Not using Map syntax anymore.
Add api error.
Proxy imports base not streamy.
Patch error handling in Multiplexer to not leak errors.
Return ProxyClient to throw an actual exception.
Ignore null in _handleRpcReply.
Merge pull request #27 from alxhub/proxy-http-request-fix

Fix a number of issues with Proxy in order to vastly improve error handling. We no longer leak exceptions, and the Apiary error information is available in a primitive form.