Gulp build chain

Fix #972

The script is going to build `master` with `gulp` on every push and, if
successful, push the resulting `dist/` to `gh-pages`.

Yay, autoprefixer!

Based on Web Starter Kit

removes uncessary pragma - react

React - Unused element footer#info

React comments - limit to 80 columns

Issue 952: fix styling for all/active/completed buttons

browser-tests - disable timeouts for Mocha 1.21 … 

Commit 17a3ca7e set timeout to Infinity,
but this still doesn't solve the issue reported in #961 if you use Mocha
1.21.

This commit changes the config for grunt test run to
`enableTimeouts=false`, and documents the equivalent command line switch
(`--no-timeouts`) for mocha executable.