Allow aws_s3_bucket resource to configure static websites on s3

This change provides attributes to configure static websites on s3:
```ruby
require 'chef/provisioning/aws_driver'
with_driver 'aws'

aws_s3_bucket 'preprod1.thechamberofunderstanding.com' do
  enable_website_hosting true
  website_options :index_document => {
    :suffix => "index.html"
  },
  :error_document => {
    :key => "not_found.html"
  }
end
```