RequireJS 2.0 was a major improvement over 1.0 as far as execution rules and the ability to integrate non-modular code into a modular project. RequireJS 2.1 refines both the execution rules and integration of non-modular code. 2.1 is very similar to 2.0, but it has enough noticeable changes that it did not make sense as a 2.0.x point release. The bigger execution rule changes are better cycle brea