iOS version of the plugin needs Pattern_Presets solution

[seclorum]

Currently its a bit cumbersome to get the PolarDesigner_Pattern_Presets installed for use in the iOS (AUv3) version of the PolarDesigner plugin - the user has to add the presets to a specific known path on their iPad, or else PolarDesigner won't find them. This might better be replaced with a system for downloading the content remotely, i.e. IAP (free) or some such mechanism.