switch the site generation to harp

old build system based on grunt and angularjs is too much.
harp is much simpler, and use the same jade based site generation

- upgrade to bootstrap3
- fix the urls
- add some screen shots

.gitignore

@@ -1,4 +1,2 @@
 node_modules
-temp
-built
-dist
+dist

README.md

@@ -1,37 +1,17 @@
-# angular-www [![Dependency Status](https://david-dm.org/buildbot/buildbot-website.svg)](https://david-dm.org/buildbot/buildbot-website) [![devDependency Status](https://david-dm.org/buildbot/buildbot-website/dev-status.svg)](https://david-dm.org/buildbot/buildbot-website#info=devDependencies)
-[Buildbot marketing website](https://buildbot.net) built with CoffeeScript and AngularJS.
+[Buildbot marketing website](https://buildbot.net) built [harp](http://harpjs.com/)
 
-## Building
-
-This site uses `grunt` for building.
-You can install that locally with
-
-    npm install
-
-which installs grunt in `./node_modules/.bin`.
-You can either add that to your PATH, or just use an explicit path, to run grunt.
-
-To build quickly for local use during development (without minifying and concatenating):
+harp is a simple static website generator built on [nodejs](https://nodejs.org/en/)
 
-    grunt
+You will shall install nodejs and [yarn](https://yarnpkg.com/lang/en/)
 
-To watch for file changes and automatically recompile on changes:
-
-    grunt dev
-
-To build a fully minimized, concatenated version:
-
-    grunt prod
+## Building
 
-In any case, you'll find the resulting site in the `built/` directory, starting with `index.html`.
-It's safe to point a web server directly at this directory.
+    yarn install
 
-## History
+## develop with live reload
 
-This site is based on AngularFun.
-Compared to AngularFun, we:
+    yarn run dev
 
-* drop the original nodejs server code
-* change build directory to "built" instead of "dist" which is already used by python setuptools.
-* use jade as a template's syntax sugar
+## compile the static website
 
+    yarn run compile