Add vagrant-bindfs for custom NFS permissions

Resolves #82
Merge pull request #83 from fullyint/bindfs

Add vagrant-bindfs for custom NFS permissions
Add checks for vagrant-bindfs & windows

Discussion in #83. Resolves #85.
Merge pull request #86 from fullyint/plugin-check

Add checks for vagrant-bindfs & windows
Changes MariaDB mirror to digital ocean

ref https://github.com/roots/bedrock-ansible/issues/90
Merge pull request #91 from austinpray/master

Changes MariaDB mirror to digital ocean
Use server-configs-nginx 1.0.0

closes https://github.com/roots/bedrock-ansible/issues/89
Merge pull request #92 from austinpray/master

Use server-configs-nginx 1.0.0
Add variable for MariaDB dist

No specific dist release of MariaDB exists for Ubuntu 14.10 Utopic yet
so we'll introduce a variable set to Trusty by default for now.
Merge pull request #94 from roots/mariadb-source-use-trusty

Add variable for MariaDB dist