Merge branch 'master' of https://git.ece.iastate.edu/danc/MicroCART_17-18

.gitlab-ci.yml

 image: ruby:2.3
 
 before_script:
-  - apt-get update -qq && apt-get install -y -qq libbluetooth-dev cmake valgrind
+  - apt-get update -qq && apt-get install -y -qq libbluetooth-dev cmake valgrind qt5-default qt5-qmake
 
 stages:
   - build

documentation/ci_faq.md

@@ -28,6 +28,11 @@ condition.
      thing is to fix the test so that we continue to have good regression
      test coverage over our code.
 
+## My build failed due to unavailable software. How do I install things on CI?
+Each build is run within a docker image. Add whatever software you need on the
+`sudo apt install ...` line inside of the `.gitlab-ci.yml` file in the root
+directory.
+
 ## How does CI work?
 When a commit is added to a branch in our repository, a notification is sent out
 to our gitlab-ci-runner, which instructs it to checkout the updated branch and