Tweaks to Travis script

Author: DustinCampbell

.travis.yml

@@ -3,8 +3,12 @@ language: node_js
 node_js:
 - "6"
 
-env:
-  - CXX=g++-4.9
+before_install:
+  - if [ $TRAVIS_OS_NAME == "linux" ]; then
+      export CXX="g++-4.9" CC="gcc-4.9" DISPLAY=:99.0;
+      sh -e /etc/init.d/xvfb start;
+      sleep 3;
+    fi
 
 addons:
   apt:
@@ -15,7 +19,6 @@ addons:
 
 install:
 - npm install
-- npm run vscode:prepublish
 - npm run compile
 - npm install -g vsce
 - vsce package