Lots of internal changes. I'm not entirely sure how removing Echo will help the project, though.. I'm excited to see what's the Batch api going to look like. I

Lots of internal changes. I'm not entirely sure how removing Echo will help the project, though.. I'm excited to see what's the Batch api going to look like. I have a few projects that definitely need it to make operations atomic. Also, readonly/hidden fields are a great addition!