Added .incompatible method (static and instance) for detecting compatibility for webgl and specific plugins
Added .incompatible method (static and instance) for detecting compatibility for webgl and specific plugins

positlabs/Seriously.js,brianchirls/Seriously.js,mcanthony/Seriously.js,positlabs/Seriously.js,hwdro/Seriously.js,hwdro/Seriously.js,brianchirls/Seriously.js,ECMachado/Seriously.js,shelsonjava/Seriously.js,ilikejames/Seriously.js,ilikejames/Seriously.js,shelsonjava/Seriously.js,ECMachado/Seriously.js,mcanthony/Seriously.js