Ecomm analytics + iOS filter parity

• add to cart and conversion events now supported via PXLAnalytics class
• added filters to match Pixlee iOS SDK capabilities

Disable Volley Caching

No longer cache Pixlee calls in Volley - caching is handled by Pixlee on the server side so client side caching via Volley isn't needed.

Update Filter Options

Merge pull request #7 from pixlee/CR/3376/KB

Add missing boolean filters

Version 1

Adds pdp albums