Droplet fixes

Picked up a new version of droplet that partially fixes its behavior when placed on a scrolling web page. This version also includes two private fixes that I've made to droplet that I'm attempting to integrate into their project.

On our side, we have a small change to generate a new 'modeOptions' object when we initialize droplet so that functions we expose in the app's object model can appear to be 'built-in' functions (the blocks will no longer allow you to edit the function name).