Fixes #206

Making HttpServerRequest.getContent() and HttpClientResponse.getContent() lazily subscribable.
Merge branch 'master' of https://github.com/Netflix/RxNetty
Added missing copyrights
Making HttpClient.submit() returning only a single item (as expected)

Also disabling mavenLocal() from the build. This causes cloudbees builds to fail if the local repo gets corrupted.
Modified links to point to ReactiveX
Fixed issues link
First pass at an http file server with support for cache headers and multiple file sources
Removing pre-created exception instances from UnicastContentSubject.
Merge pull request #207 from NiteshKant/master

Fixes #206
Fixes #199

Wrong metric event was being used.
Updated CHANGES.md for release 0.3.12
Merge pull request #212 from NiteshKant/master

Fixes #199
Use URI instead of URL
Don't auto-flush writeFileRegion
Enable basic guard against basic hacks
Add unit tests
Check for file existence when using LocalDirectoryURIResolver
Clean up implementation to merge the URIResolver into specific subclasses of FileRequestHandler.
Remove support for cascading file sources.  This may be added later.
Introduce HttpError to attach an HTTP response code to exceptions
Update from code review
Fixes #216 (Remove use of Subject in HttpClientResponse and HttpServerRequest)
Fix typos
Cleanup checked exception handling
Add more logging
Support for keep alive headers
Support for chunked response
Support for SSL
Create .travis.yml