Tentative fix for #77 and #154. The only problem I see with this fix is that it uses an internal type (com.jayway.restassured.internal.http.ContentEncoding) in the public API : could this type be moved outside the internal package ?
Use of a config object for configuration of "Accept-Encoding" header. This configuration can be done globally (with RestAssuredConfig.newConfig().acceptEncodingConfig(...)) or locally (given().acceptEncoding(AcceptEncodingConfig.XXX)...).
Default value is "gzip,deflate".
Merge pull request #17 from Zlika/master

Tentative fix for #77 and #154