Re eclipse#488 - added build instructions for BATS to README

Signed-off-by: Marshall McDonnell <[email protected]>

README.md

@@ -4,11 +4,23 @@ Please see [the website](https://www.eclipse.org/ice) for more information on th
 
 ## Build Instructions
 
-Checkout the project and from the org.eclipse.ice.build directory execute
+Checkout the project and execute
 ```bash
 mvn clean install
 ```
 
+### Building BATS
+
+The above build instructions will NOT include building `org.eclipse.ice.bats`.
+
+This is due to the need to have an installation of Docker to run the BATS integration test.
+
+In order to include BATS, you can instead run the `full` profile for the build instruction:
+
+```bash
+mvn clean install -P full
+```
+
 ## Using the project generators
 
 Once the build is complete, use the project generators to get started with a new Eclipse ICE project. From the shell, execute the following for a basic project: