In ok.extendObject(), use Object.create() to clone the parent class's prototype, instead of instancing the parent class. This removes the need for classes to have separate .construct() methods.
Rename findCssRules() to searchCssRules(),  for consistency. Usually, search* methods return the matches, and find* methods return the indexes of matches.
Add isVector() and objectMerge()
Add randomInt() and randomFloat()
Add roundFloat()