Add eCommerce support

This PR does a few things:

* Adds eCommerce support (Fixes #17).  Specifically for WooCommerce and WP eCommerce.
* Prefixes filter names, functions names (and much else) with Segment, rather than Segment_IO
* Adds a fully baked page() method.
* Adds a class to help with client-side handling of server-side events.
* Features Bob Ross quotes in commit messages.
nitpicky, but isnt it weird to align these to the ones in the group below? but not the group above? definitely feel free to ignore this comment :)