Docker has a 42 AUFS layer limit, this limits each image to 1 layer

@jpetazzo is this a step in the right direction? dotcloud/docker#2028
Former precise Dockerfile, more consistent with the ubuntu:12,04 image
Using the new howareyou/ubuntu:12.04 image

Fixed export & profile sourcing
Getting back the multi-line: yay!
Broken down the sausage lines (yes, they were ugly!)
Cleaner multi-line RUN syntax

https://github.com/dotcloud/docker/issues/2028#issuecomment-25438520
Minimal AUFS layers for redis image
MySQL build as a single layer
Updated ruby-build

Including more system libs, gems with native extensions were failing to
build properly
redis container will always expose 6379
Supervisor image, WIP
Merge pull request #1 from cambridge-healthcare/combining-commands

Combining commands