Technical specification

The preview pane is inherited from https://github.com/electron/electron/blob/master/docs/api/browser-window.md, thus we can only load URLs, i.e. local files (via the files:// protocol) or remote locations; rendering HTML code using the data:// protocol runs into problems (apparently remote stylesheets can't be resolved then)
WebPPL-viz assumes some objects, that are initialized by WebPPL-editor. Workaround is provided in the overrides.js file
When "Toogle Preview on Save" is checked, we read directly from file (https://stackoverflow.com/questions/16387192/read-file-to-string-with-coffeescript-and-node-js) and only render WebPPL preview when save event is detected, otherwise we copy webppl script directly from the editor

Known problems

Uncaught TypeError: k is not a function with execution using webppl.run(): FIXED
print() doesn't work as expected (opens print dialog instead of showing the values); you can use display() instead
Infer statements don't show anything (they should be wrapped either with viz() or display())

#TODOs:

Activate plugin only when WebPPL file is opened (to be able to do so, WebPPL specific language grammar should be provided first)
Add npm dependencies to WebPPL to support completely offline workflow
Investigate on how to make most of the HTML static (look at the showError implementation for this) and only reload portion with the script and not the entire page ** or maybe use string replacement on index.html template
Only rerender html preview when the actual script is changed (currently this is bound to the editor generally, so no mather which file you change, the preview gets updated) ** Alternatively: close the preview when leaving the script (might be unuseful when we import scripts in the main script)