Merge pull request #250 from unfiltered/unqualified_names

Unqualified names
Let's have a cool build status icon too.
Merge branch '0.8.2' of github.com:unfiltered/unfiltered into 0.8.2
upgrade to netty 4.0.22
upgrade to scalatest 2.2.1
Merge pull request #252 from unfiltered/upgrade_scalatest

upgrade to scalatest 2.2.1
update to netty 4.0.23.Final
Merge pull request #251 from unfiltered/update_netty

upgrade to netty 4.0.22
netty-server section: add missing method call on Server

The current "unfiltered.netty.Server(8080).plan(hello).run()" returns

```
error: not enough arguments for method apply: (portBindings: List[unfiltered.netty.PortBinding], handlers: List[() => io.netty.channel.ChannelHandler], beforeStopBlock: () => Unit, chunkSize: Int, engine: unfiltered.netty.Engine)unfiltered.netty.Server in object Server.
Unspecified value parameters handlers, beforeStopBlock, chunkSize, ...
```

The proposed change will properly start the server on http://127.0.0.1:8080
Merge pull request #253 from lbarasti/patch-1

Docs - netty-server section: add missing method call on Server
Relagate `filter` methods to a `FilteringDirective` subtype. This
isolates other directives from the no-op filter strangeness, and opens
up some possibilities of useful filtering.
Construct `FilterDirective` where possible, to enable filtering.

When a directive is constructed via `when ... orElse` or
`Directive#orElse`, we can filter a successful result and fall back to
the orElse directive. This allows for ad-hoc extention of directive
requirements in the `if` clause of a for expression.

Added a demonstration to DirectiveSpec.
Fix spelling error.
Merge pull request #258 from unfiltered/directive_filter

Support ad-hoc filtering of directives
Add ability to retrieve HTTP status code from HttpResponse

The use case here is to be able to get the response status code
in a backend-agnostic way, i.e. without resorting to downcasts of
the underlying response object. This is useful when writing very
generic intents, e.g. for doing metrics on the request/response
cycle.
Bump servlet-api to 3.0.1
Use HttpServletResponse#getStatus to get status code for Jetty backend
Merge pull request #259 from BardurArantsson/add-getstatus

Add ability to retrieve HTTP status code from HttpResponse
Typofixes in websockets readme
Merge pull request #261 from skazhy/websocket_typofixes

Updated netty-websockets readme