Merge pull request #37 from miloyip/TravisSetting2

Adds Valgrind memcheck process to Tavis CI

.travis.yml

@@ -11,7 +11,7 @@ env:
 before_install:
   - sudo add-apt-repository -y ppa:codegear/release
   - sudo apt-get update -qq
-  - sudo apt-get install -y premake4
+  - sudo apt-get install -y premake4 valgrind
 
 install: true
 
@@ -25,4 +25,5 @@ script:
   - make -C build/gmake -f example.make 
   - cd bin
   - ./unittest_${config_suffix}
+  - valgrind --leak-check=full --error-exitcode=1 ./unittest_${config_suffix}
   - ./perftest_${config_suffix}