feat: `kube-aws up --s3-uri s3://<bucket>/<directory> to automaticall…

…y avoid the 51200 bytes limitation errors of CloudFormation (kubernetes-retired#45)

feat: Add the `--s3-uri s3://<bucket>/<directory` flag to automatically avoid the 51200 bytes limitation errors of CloudFormation

If you are hit by the cloudformation limit, `kube-aws up`, `kube-aws update`, `kube-aws validate` now fail with a specific error explaining the limit and how to work-around it:

```
$ kube-aws up
Creating AWS resources. This should take around 5 minutes.
Error: Error creating cluster: stack-template.json size(=51673) exceeds the 51200 bytes limit of cloudformation. `--s3-uri s3://<bucket>/path/to/dir` must be specified to upload it to S3 beforehand
...

As the error message says, if you provide the `--s3-uri` option composed of a s3 bucket's name and a path to directory, `kube-aws` uploads your template to s3 if necessary:

```
$ kube-aws up --s3-uri s3://mybucket/mydir
```

Also note that `--s3-uri` accepts URIs without directories, too.
Both `--s3-uri s3://mybucket` and `s3-uri s3://mybucket/mydir` are valid.

The E2E test script now include the cluster updating test with `kube-aws update`.

resolves kubernetes-retired#38 (for now)

Merge pull request kubernetes-retired#34 from mumoshu/stabilize-kubel…

…et-startup

Fix instability while starting kubelet on worker/controller nodes

fix(e2e): do not fail when there's 2 or more cfn stacks named exactly…

… the same

Merge pull request kubernetes-retired#20 from mumoshu/kubernetes-1.4.5

Bump Kubernetes version to 1.4.5+coreos.0

Merge pull request kubernetes-retired#15 from qqshfox/fix_iam_for_chi…

…na_region

add a new var IsChinaRegion to fix for China Region

Merge pull request kubernetes-retired#12 from qqshfox/fix_MapPublicIPs

fix MapPublicIPs in stack template

Merge pull request kubernetes-retired#4 from pieterlange/feature/dont…

…-map-public-ips

Simple toggle to stop the automatic assignment of public IP's for all the nodes.