Feature/js integration #20
Following #18 , this is a second step of the integration. Chains now are integrated into the View class and js() and on() methods are implemented.
Test suite has been added and I've also added our first Selenium test!
Travis tests are currently ignored because of http://stackoverflow.com/questions/41337139/allow-phpunit-test-to-access-actual-environment-variable?noredirect=1#comment69877502_41337139