Switching to freemium

After a lot of feedback received that mentioned pricing, I've decided to pull the trigger and switch API Bakery to freemium.

The reason is that, due to a lot of free / open source tools that work similar to API Bakery, there is an expectation that at least the basic functionality is free.

Since the long-term plan is to build a lot more power into the system, there will be many reasons to subscribe to premium version. For now, the focus will be on growing the user-base.