[JCLOUDS-702] JCloud ProfitBricks provider implementation

Hi! This implements most of ProfitBrick's API. I look forward for your comments, suggestions, and revisions.
Take care: you should *copy* every single field you set in the binder. To avoid having to manually keep them up to date, better use the [HttpUtils#copy](https://github.com/jclouds/jclouds/blob/master/core/src/main/java/org/jclouds/http/HttpUtils.java#L170-L178) method.