.travis.yml now builds all environments

.travis.yml

@@ -2,8 +2,6 @@ language: python
 python:
     - "2.7"
 
-# Cache PlatformIO packages using Travis CI container-based infrastructure
-sudo: false
 cache:
     directories:
         - "~/.platformio"
@@ -18,5 +16,11 @@ install:
     - pip install -U platformio
     - platformio update
 
+env:
+    - BUILD_CONFIG=feedc0de_usb
+    - BUILD_CONFIG=aveexy_usb
+    - BUILD_CONFIG=testbench_usb
+    - BUILD_CONFIG=mickdermack_usb
+
 script:
-    - platformio run -e feedc0de_usb
+    - platformio run -e $BUILD_CONFIG