Extension host (#20)

* Implement net.Server

* Move Socket class into Client

This way we don't need to expose anything.

* Remove some unused imports

* Pass environment variables to bootstrap fork

* Add debug log for when socket disconnects from server

* Use VSCODE_ALLOW_IO for shared process only

* Extension host can send messages now

* Support callback for logging

This lets us do potentially expensive operations which will only be
performed if the log level is sufficiently low.

* Stop extension host from committing suicide

* Blank line

* Add static serve (#21)

* Add extension URLs

* how did i remove this

* Fix writing an empty string

* Implement dialogs on window service

packages/web/webpack.dev.config.js

@@ -1,8 +1,12 @@
+const path = require("path");
 const webpack = require("webpack");
 const merge = require("webpack-merge");
 
 module.exports = merge(require("./webpack.common.config.js"), {
 	devtool: "cheap-module-eval-source-map",
+	output: {
+		path: path.join(__dirname, "out"),
+	},
 	entry: [
 		"webpack-hot-middleware/client?reload=true&quiet=true",
 		"./packages/web/src/index.ts"