Update README to use Google Chart API.
Delete RandomBuilder.
Add Random module.
Fix README and example scripts.
Change APIs

* Changes Random.get/Random.next as not curried.
* Changes Seq.ofRandom as not curried.
* Changes the order of parameters of functions returned by Seq.markovChain.
Inlining.
Change API

getRandom, getRandomBy, getRandomBy2 are moved to Random module and renamed.