HowTo update traceur compiler web site demos

Site

The site http://google.github.io/traceur-compiler serves content from the gh-pages branch of this repository. The top level index.html file redirects to the wiki GettingStarted page, so authoring site docs is just editing the wiki pages. The wiki pages in turn can link back to the .html files on the site for demos. For example, you can try the repl page

Updating

• Content: edit the wiki pages
• Demos: fast-forward the gh-pages branch to match the master branch.

Never diverge gh-pages from master, always use git merge --ff-only master