Install buildbot-www on Travis
Fetch objects and tags from upstream git repository on Travis

Required for proper work of `git describe`.
Disable SSH host key checking on Travis

Otherwize ssh will ask confirmation from command prompt.
Fix wrong Travis section
Use HTTPS protocol instead SSH

Travis VM doesn't have account with valid SSH key on github.com
Use git protocol
Install fresh Node.js

With Node.js v0.10.12 buildvot-www installation failed. Currently new
version is v0.10.20.
Merge branch 'travis_install_buildbot_www' of git://github.com/vrutsky/buildbot into nine