Port to Typescript about chrometana HOT 1 OPEN

This is a start master...nemchik:typescript
It's not perfect, but it builds and loads correctly in Chrome.

The commits are a bit messy because I wanted git to correctly recognize the files being renamed (without the rename commit, git thought I removed the files and added new ones that were unrelated). [edit] this started cleaner, and then got really messy [/edit]

p.s. most of this is based on https://github.com/microsoft/TypeScript-Babel-Starter

Edit (other notes):

• I replaced node-sass (deprecated) with sass which is a Dart implementation recommended as a replacement.
• I added html-webpack-plugin and mini-css-extract-plugin to automatically create options.html
• I'm pretty sure I've broken the bootstrap, because it redirects to https://www.bing.com/?form=REDIRERR (that exact URL) but hopefully I've made some obvious mistake that can be easily fixed.

from chrometana.