Upgraded jQuery
Clarify that only main.less is compiled automatically.  Other .less files need to be explicitly referenced in build.sbt.  The "For example" in the current documentation makes it sound (to me) like this is one example of a general case -- anything with the extension .less will be compiled.
Expose Ning AsyncHttpClientConfig Settings. Fixes #3353

- add a NingWsClientConfig
- setup a NingWsClientConfig Provider
- Expose the following ning settings:
- Backwards compatibility with versions <= 2.3.X

```
    ws.ning.allowPoolingConnection = Boolean
    ws.ning.allowSslConnectionPool = Boolean
    ws.ning.ioThreadMultiplier = Int
    ws.ning.maximumConnectionsPerHost = Int
    ws.ning.maximumConnectionsTotal = Int
    ws.ning.maximumNumberOfRedirects = Int
    ws.ning.maxRequestRetry = Int
    ws.ning.removeQueryParamsOnRedirect = Boolean
    ws.ning.requestCompressionLevel = Int
    ws.ning.useRawUrl = Boolean
```
Merge pull request #3750 from mkurz/jQueryUpgrade

Upgraded jQuery
Merge pull request #3361 from mattweber/ningsettings

Expose Ning AsyncHttpClientConfig Settings
Merge pull request #3751 from bwbecker/LESS_doc

Clarify that only main.less is compiled automatically.  Other .less file...
Update JavaWS.md

the property to enable gzip/deflate compression was incorrectly documented as ws.compressionEnable. DEBUG logging on the com.ning.http logger (and subsequent source code mining) showed this had no effect. Also updating ScalaWS.md doc
Update ScalaWS.md

the property to enable gzip/deflate compression was incorrectly documented as ws.compressionEnable. DEBUG logging on the com.ning.http logger (and subsequent source code mining) showed this had no effect. Also updating JavaWS.md doc.
Merge pull request #3759 from chrisrhut/master

fix documentation typos in the WS compression enable property name