added cleanExperimentEnviroment()

solved problem of event listeners being constantly binded to a after
window.onbeforeunload, by cleaning all clicks first in clickCounter()
with window.onbeforeunload = null;

 setCookieData() set all cookie data from experiment variabled

changed global functions $experimentSystem

updated experimentEnviroment() to check weather a experiment is in
progress when initialising, if it is it grabs values and sets
experiment varibles for enviroment