Switch over to our own dev server for the client

This version will allow us a lot more control over stubbing and faking
out responses from the "server" in the future.

Splits /client into two sections, each with their own package.json

[1] /client: Now just for the literal client. No "build" dependencies
    in this project.
[2] /client_toolchain: For all the code and dependencies necessary to
    compile the client as well as run the dev server.

npm commands have been reworked:

  `$ npm start` - starts the dev server
  `$ npm deploy` - compiles the client for production (and updates
                   dependencies if necessary)
  `$ npm dev-deps` - Installs additional development dependencies

.gitignore

@@ -6,5 +6,6 @@ pkg/
 run.sh
 node_modules/
 /client/dist
-/client/stats.json
+/stats.json
+/client_toolchain/dev_server/dist
 static/dist

client/README.md

@@ -1,21 +1,36 @@
 # Client
 
-## Development setup
+## Setup
 
-First, install the "Current" version of [Node.js](https://nodejs.org/).
+Install the "Current" version of [Node.js](https://nodejs.org/).
 
-Then install dependencies:
+## Deploying
+
+To build the production version of the client, run:
+
+```
+$ npm run deploy
+```
+
+## Development
+
+First install dependencies:
+
+```
+$ npm run dev-deps
+```
+
+Then start the development server:
 
 ```
-$ cd client
-$ npm ci
+$ npm start
 ```
 
-Finally, run `$ npm start` to run the development server. Or run `$ npm run build` to build the production version (to be checked in).
+Then visit [http://localhost:8080] in your browser to see your local version.
 
 ## Recommended editor setup
 
 I strongly recommend using [VS Code](https://code.visualstudio.com/).
 
 Install the Vetur extension (View > Extensions). After installing, click the
-gear icon
+gear icon > Extension Settings.. > Enable "Template Interpolation Service".