Update website documentation to use builders instead of creating state machines directly

[DaveShopCtrl]

Documentation on Appcellerate website is out of date. For example take this example documentation: http://www.appccelerate.com/statemachinesample.html

However currently state machines do not have empty contructors anymore. I almost removed Appccelerate from our solution until I saw that the repo readme(.md) had an example where a state machine builder is used..

Please update documentation to reflect this breaking (api) change.