removed internal redis server
readme: added note about upcoming removal of internal mysql server
readme: added mysql migration instruction
launch a redis container if we can connect to the host docker

When the redis connection parameters are not specified, the image
will try to spin up a redis container if it is able to communicate with
the host docker.

This is only possible if the following two options are specified in the
docker run command:
  `-v /var/run/docker.sock:/run/docker.sock`
  `-v $(which docker):/bin/docker`

This is primarily added to get the quick start guide to work without
much of a hassel.
Merge branch 'remove-internal-redis'

Refer #39
Refer #149
makefile: renamed target start -> quickstart
makefile: cleanup
install: moved the apt-get blocks