updated return types of reduce/foldl/inject
added definitions for underscore-ko 1.2.2
updated readme for new underscore-ko definitions
Add createEntity method to EntityManager

Add createEntity method to EntityManager
Merge pull request #390 from Steve-Fenton/patch-1

Add createEntity method to EntityManager
Added logChange to extenders.

Added logChange to extenders.

http://knockoutjs.com/documentation/extenders.html
Merge pull request #393 from Steve-Fenton/patch-2

Added logChange to extenders.
bug fix 'knockout->KnockoutExtenders'
Merge pull request #394 from Diullei/master

bug fix 'knockout->KnockoutExtenders'
Merge pull request #388 from MagicMau/master

Updated Underscore.js and added underscore-ko.js