Cat is Reborn

Breaking changes:

• slim version no longer provided. Will use underscore, or shim the things we need
• removed allowing deprecated options from 1.3.x
• moved development version into /src dir and no longer use grunt here

nothing big and exciting in version 2, just semvar and breaking changes.

bug fixes:

• #348 - headers Stay stuck after reposition
• commonjs support works now, i promise