README: update example .kitchen.local.yml

It would seem the format is now as I have specified.
added `use_cache` and `remove_intermediate_containers` config options
Merge pull request #45 from fujin/patch-1

README: update example .kitchen.local.yml
removed `remove_intermediate_containers`, little value, we have the cache
documented `use_cache`
cutting 1.0 \o/
added "which" package to rhel/centos provisioning
version bump, 1.1.0.beta, rhel/centos provisioning change
Add -N flag to ssh-keygen commands

This step was hanging when the user is prompted to enter a passphrase or 'enter' for no passphrase.  -N defaults to an empty passphrase if this occurs.
[dockerfile] added custom dockerfile support (w/ erb)
[dockerfile] image and platform are driver config options, added ubuntu-13.10 platform
[dockerfile] added another test suite to test parallel/concurrency
[dockerfile] DockerERBContext class for Dockerfile ERB
             - use instance variables in template
Merge pull request #53 from portertech/dockerfile

Added custom Dockerfile support
Merge pull request #46 from madhatter/master

Added support for platform arch
parallel/concurrency can break container rm, check if container exists
docker "binary" config option, ubuntu 14.04 uses `docker.io`, default serverspec
document "binary" config option
include chef install for test containers/suites
Merge pull request #51 from scarolan/patch-1

Add -N flag to ssh-keygen commands