Update to latest version of sir-trevor-js master branch and fix bindFormSubmit

Add new javascript and css

Also made a fix SirTrevor.bindFormSubmit 2e4125faa5f9798368b61feb1c0f549204251cab 
The formbound variable is set to the SirTrevor object. This means when you have multiple instances the formBound attribute will be set as true on the first time and won't bind onFormSubmit to the other forms. This broke our application and therefor we made this fix. Maybe this is not the best solution, but it works for us. A formBound on the Editor instance would maybe work?