JCloud ProfitBricks provider implementation

Hi! This implements most of ProfitBrick's API. I look forward for your comments, suggestions, and revisions.
Could you explain a bit what the implementation tries to do, and why the default TemplateBuilder does not work for this provider?
There is many sensible code that is just copied from the parent class. If needed, we'd better change the visibility of those methods to avoid code duplication.