update netty 4.0.19.Final
Merge pull request #211 from xuwei-k/update-netty

update netty 4.0.19.Final
async.Plan is meant to extend this base trait, otherwise it does nothing!
Handle null requestURI a little more gracefully.

In some circumstances the return value of req.getRequestURI could be
null. For example, if a reference is held to a request from a
completed request cycle. Instead of serializing `null` to the string
`"null"`, treat it as empty. Closes #210
seeing some encoder issues with DefaultFileRegion
don't tie response binding interface to full http response, resources may be chunked. chunked resources are then responsible for sending their own last chunk
don't define consts that netty already does (CharsetUtil), be sure to write back the connection header
stricter privacy, more netty constant usage, content length should be that of the response and _NOT_ of the request content, duh?
create less strings, these things are consts
refactor content check into an extractor
remove unused imports
less pain when making broad changes
intercept unsolicited pong, impl cont frame. fixes #212
lots of bug fixes
netty 4 and other news
0.8.0
Remove specs1 module that is not compatible with current versions of
Scala. Comment out scala-test module, needs to be updated to 2.x.
update to json4s version compatible with all of our scala versions
ls versions
version updates