Merge pull request #35 from poupotte/master

Test
add missing dependencies to the README file
Added: a script to update the virtual machine environment
Merge pull request #36 from jsilvestre/feature/devenv-update

Added: a script to update the virtual machine environment
clean script + remove redis from installation (no longer required)
remove redis from readme
better usage of fabtools for node package updating
change information text about coffee, monitor and compound install
debug nginx configuration (for websockets)
Merge branch 'master' of github.com:mycozycloud/cozy-setup
remove redis redirection from dev virtual machine
add assistance paragraph to README
add brunch to the list of node installed modules
useless word
typo
typos
install right libmozjs version depending on os
add data index to forwarded ports of the dev machine
remove port from README
change port in the README test section