The case for Immutability

- good intro: http://www.sitepoint.com/immutability-javascript/ by @cjohansen ( ... but does not _explain_ **_why_** the immutability makes writing the application _easier_ ... )
+ Predictable State Container:
http://www.youhavetolearncomputers.com/blog/2015/9/15/a-conceptual-overview-of-redux-or-how-i-fell-in-love-with-a-javascript-state-container
- Immutable Data Structures and JavaScript http://jlongster.com/Using-Immutable-Data-Structures-in-JavaScript by @jlongster
- The Dao of Immutability: https://medium.com/javascript-scene/the-dao-of-immutability-9f91a70c88cd#.qjyhys72r by @ericelliott
- If immutable objects are good, why do people keep creating mutable objects? (_discussion_):
http://programmers.stackexchange.com/questions/151733/if-immutable-objects-are-good-why-do-people-keep-creating-mutable-objects
- http://facebook.github.io/immutable-js/ do we _need_ a module for this...?
- Lee Byron on Immutable.js https://www.youtube.com/watch?v=kbnUIhsX2ds