Update Vagrantfile

Giving the box own name 'Ubuntu' from virtualbox side and replacing the vagrant 'default' name by 'Ubuntu'
fixed the nvm installer
Update Vagrantfile
Merge pull request #363 from gayanhewa/master

Update Vagrantfile
Adds ØMQ script
update to contrib docs
updated readme for contrib notes
Merge branch 'master' of github.com:fideloper/Vaprobash
Adds zeromq.sh script to the Vagrantfile
distinction between server_timezone and php_timezone
fix wrong argument being passed to sed for setting php date.timezone
Merge pull request #370 from jtallant/master

Distinction between php timezone and server timezone
Merge pull request #366 from underparnv/feature/zeromq

Adds ØMQ script
moving to more solid use case of proxying to php-fpm from apache
Merge branch 'socket'
moving server timezone provisioning with rest of provisioners
Merge pull request #358 from AchuM/patch-1

Update Vagrantfile
Merge branch 'master' of github.com:fideloper/Vaprobash
naming vm machines vaprobash
Merge pull request #361 from mohitmamoria/master

Fixed the NVM Installer