Use .galaxy_install_info to trigger role installation

The `ansible-galaxy` command is nice enough to leave behind a bit of
metadata associated with role installation
(`role_name/meta/.galaxy_install_info`). The `Vagrantfile` now attempts
to determine the version of an installed role based off of the metadata
in that file. If the versions don't match, an install of all role
dependencies occurs.

I'm not in love with this solution, but I think that it is better than
force reinstalling all role dependencies every time (~10 seconds on
every provision).
Merge branch 'feature/smarter-ansible-role-install' into develop
Make 8081 the Kibana port globally
Template and parameter file references were broken
Add RELP to nyc-trees.logstash
Ensure that Apache collectd plugin uses apache_port
Add variable grouping for monitoring servers
Create staging variable grouping; add Amazon NTP servers
Create VPC stack outputs for VPC ID and bastion subnet and IP
Create Packer template for cutting the monitoring AMI
Create deployment helper script to aid in creating AMIs
Add support for creating VPC stack to deployment helper
Move VPC stack creation into deployment-helper
Move data store stack creation into deployment helper
Move monitoring AMI and VPC stack update into deployment helper
Update README sections for deploying VPC and data store stacks
Add elbAppServer and elbTileServer as defaults
Update AZs because us-east-1a does not have t2 capacity
Use m3.medium to cut AMIs because of t2 instance limits
Move Makefile and requirements.txt up one directory