Update hostsfile and add zerotier cookbook

cookbooks/zerotier/README.md

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+ZeroTier Cookbook
+==================
+
+This is a [Chef](https://www.chef.io/) cookbook to manage [ZeroTier](https://www.zerotier.com) networks on your Chef nodes.
+
+Supported Platforms
+---------------------
+* Debian
+* Ubuntu
+* CentOS
+* RHEL
+* Amazon
+
+Recipes
+---------------------
+`zerotier::default`
+
+Default recipe.  Calls `zerotier::install`
+
+`zerotier::install` 
+
+Install's ZeroTier One on your system via the native package management system.
+
+`zerotier::ohai_plugin` 
+
+Installs the Ohai plugin for ZeroTier.  This is required by the provided LWRP `zerotier_network`.
+
+`zerotier::join_networks`
+
+Shortcut to automatically join networks stored in attributes (See example in the Attributes section below)
+
+Attributes
+---------------------
+`node['zerotier']['install_version']` 
+
+Version of ZeroTier to install.  Empty by default and defaults to the latest version available.
+
+`node['zerotier']['central_url']`
+
+URL to the instance of the ZeroTier Central controller. Defaults to https://my.zerotier.com.  Will be useful in the future when Central is distributable to our enterprise customers.
+
+`node['zerotier']['public_autojoin']`
+
+List of *public* networks to automatically join when using the `zerotier::join_networks` recipe.  These networks do not require any interaction with the network controller.
+
+`node['zerotier']['private_autojoin']`
+
+List of *private* networks to automatically join when using the `zerotier::join_networks` recipe.  Joining a private network requires an API Access Token generated at https://my.zerotier.com.  Each member of the list is a hash as follows:
+
+```
+{
+	:network_id => "your_network_id",
+    :auth_token => "your_auth_token",  # API access token generated at https://my.zerotier.com
+    :central_url => "URL_to_central_instance" # Not required.  Defaults to https://my.zerotier.com
+}
+```
+
+LWRP
+---------------------
+The ZeroTier recpie provides the `zerotier_network` lwrp
+
+Attributes:
+
+- network_id - Network ID to join. defaults to the name attribute.
+- node_name - Name of the node to put in https://my.zerotier.com (only applicable when joining a private network)
+- auth_token - API access token generated in your account at https://my.zerotier.com. Required if you wish to automatically authorize the node to join the network.
+- central_url - URL to the instance of ZeroTier Central.  Defaults to https://my.zerotier.com.
+- action - `:join` or `:leave`.  Defaults to `:join`