Scan and load actions and stores using webpack contexts

[baaygun]

Instead of using index.js files for stores and actions, this change uses Webpack contexts to scan the two folders at compile time and dynamically bundle files.

This has the added benefit of not having to maintain index.js files for our actions and stores.

One change that had to happen to achieve this was change action name strings like toolSuperselectType to tool.superselect.type where it's a dot separated path of the file.

[shaoshing]

Hey @volfied that's a very nice use of the WebPack's context feature! I just have a few questions, otherwise, everything looks excellent. Back to you.

[baaygun]

@iwehrman and @shaoshing thank you for your reviews. I've cleaned up the code and am actually using contexts a bit smarter and integrated to flux controller now.

Please re-review.

[baaygun]

@iwehrman right back at ya.

[iwehrman]

LGTM.