ESXi Terraform Provider automatic installation

Since Terraform 0.13.x there is no need to build the provider or download it manually. The file versions.tf was added to specify the provider name in the Terraform Registry. The instructions in the README file have been updated to reflect this change.

ESXi/README.md

@@ -5,20 +5,17 @@ NOTE: This is an early release and it's possible that certain features may not w
 
 ## Prereqs (~30-60 minutes)
 0. Have an ESXi instance version 6 or higher. VSphere is **NOT** required.
-1. Install the [requirements from the ESXi Terraform Provider](https://github.com/josenk/terraform-provider-esxi#requirements)
-    * If building on MacOS, don't forget to change the GOOS from linux to darwin!
-        * `GOOS=linux` -> `GOOS=darwin`
-2. Build and install the [terraform-provider-esxi](https://github.com/josenk/terraform-provider-esxi#building-the-provider) provider
-3. Your ESXi must have at least two separate networks - one that is accessible from your current machine (VM Network) and a HostOnly network to allow the VMs to have internet access (HostOnly). 
-4. [OVFTool](https://my.vmware.com/web/vmware/details?downloadGroup=OVFTOOL420&productId=618) must be installed and in your path. 
+1. The ESXi Terraform Provider built by https://github.com/josenk/terraform-provider-esxi will be installed automatically from the Terraform Registry, if you are using Terraform 0.13.x or higher. If needed, the lastest provider package can be downloaded manually from https://github.com/josenk/terraform-provider-esxi/releases.
+2. Your ESXi must have at least two separate networks - one that is accessible from your current machine (VM Network) and a HostOnly network to allow the VMs to have internet access (HostOnly). 
+3. [OVFTool](https://my.vmware.com/web/vmware/details?downloadGroup=OVFTOOL420&productId=618) must be installed and in your path. 
     * On MacOS, I solved this by creating a symbolic link to the ovftool included in VMWare Fusion: `sudo ln -s "/Applications/VMware Fusion.app/Contents/Library/VMware OVF Tool/ovftool" "/usr/local/bin/ovftool"`
-5. On your ESXI, you must:
+4. On your ESXI, you must:
    1. Enable SSH
     2. Enable the "Guest IP Hack" 
     3. Open VNC ports on the firewall
     * Instructions for those steps are here: https://nickcharlton.net/posts/using-packer-esxi-6.html
     * Alternatively, you can install the VIB file from https://github.com/sukster/ESXi-Packer-VNC which will automatically open the VNC ports on the ESXi firewall.
-6. [Install Ansible](https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html)
+5. [Install Ansible](https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html)
 
 ## Steps