Merge pull request #5 from yui-knk/use_new_container_based_infrastructure

Use the new container-based test infrastructure on travis ci

.travis.yml

@@ -1,10 +1,14 @@
+sudo: false
+addons:
+  apt:
+    packages:
+      - rake
+      - bison
+      - git
+      - gperf
 language: c
 compiler:
   - gcc
   - clang
-before_install:
-    - sudo apt-get -qq update
-install:
-    - sudo apt-get -qq install rake bison git gperf
 script: 
   - rake test