upgrade k8s vers, and add a script for future upgrades

fixes the certs issue when masters or not in the kube-node group

Issue 231: ensure ca.pem makes it to multi-masters

Issue 233: Typo with sync_tokens vs. sync_certs

Add native Vagrant support

* set flannel backend type to `host-gw`
* set flannel interface to be eth1 ip

This allows you to simply run `vagrant up` to get a 3 node HA cluster.

* Creates a dynamic inventory and uses the inventory/group_vars/all.yml
* commented lines in inventory.example so that ansible doesn't try to use it.
* added requirements.txt to give easy way to install ansible/ipaddr
* added gitignore files to stop attempts to save unwated files
* changed `Check if kube-system exists` to `failed_when: false` instead of
`ignore_errors`

generate secrets on first master

fix api auth issue for ci tests

use a variable for api's 'root' password

Pull correct variable for etcd initial variable

This shouldn't use the `inventory_hostname` variable, as that will just yield the same variable, but rather use the `host` which we're looping over.

Fix ansible dict error on Ubuntu 14.04

This fixes the ansible error ```'dict object' has no attribute
'ansible_default_ipv4'"}```. Closes #215

Upgrade weave v1.5.0 with CNI

upgrade calico v0.19.0, calico-cni v1.2.1

Add code to detect if epel is already installed and skip it if it is

cosmetic

as per @smana request

Provide a non-default hostname for CoreOS systems.