Switch to debs for ruby, node, and redis

[agrieser]

Compile once and build debs for ruby, node and redis. This reduces the provisioning time from ~11 minutes to ~3.

• Includes a version update for ruby (2.0.0-p195 -> 2.0.0-p247) to fix a security vulnerability with ssl
• Also includes minor version bumps for node (0.10.11 -> 0.10.12) and redis (2.6.13->2.6.14)

There's no reason to re-provision, but the process would be:

vagrant destroy
vagrant up

Updated time

Chef Run complete in 180.61537428 seconds