Small update to Install Cave webpage:

- add latest version numbers at the very top, and under each OS specific heading

docs/install/install-cave.md

@@ -4,6 +4,14 @@ CAVE is the **C**ommon **A**WIPS **V**isualization **E**nvironment that is used
 
 ---
 
+## Current CAVE Versions
+
+- **Linux: 18.2.1-1**
+- **Windows: 18.2.1-1**
+- **Mac: 18.2.1-2**
+
+---
+
 ## General Requirements
 
 Regardless of what Operating System CAVE is running on, these general requirements are recommended in order for CAVE to perform optimally:
@@ -25,6 +33,8 @@ Regardless of what Operating System CAVE is running on, these general requiremen
 
 ## Linux <i class="fa fa-linux"></i> 
 
+**Latest Version: 18.2.1-1**
+
 ### System Requirements
 
 - 64 bit CentOS/Red Hat 7
@@ -48,6 +58,8 @@ To run CAVE either:
 
 ## Windows <i class="fa fa-windows"></i> 
 
+**Latest Version: 18.2.1-1**
+
 For Windows, Unidata offers two installation options: a [**Linux Virtual Machine**](#method-1-linux-virtual-machine), or a [**Direct Windows Installation**](#method-2-direct-windows-install).
 
 Currently, the [virtual machine (VM)](#method-1-linux-virtual-machine) is the recommended form of install for those who do not have administrative priviledges on the machine, or beginners who want a simpler installation process.  
@@ -146,6 +158,8 @@ To run CAVE, either:
 
 ## macOS <i class="fa fa-apple"></i> 
 
+**Latest Version: 18.2.1-2**
+
 ### System Requirements
 
 - Will need admin privileges to install `awips-python.pkg`