Added Travis CI config (#336)

Added Travis CI config

.gitignore

@@ -10,3 +10,4 @@
 /error.txt
 /test.out.txt
 .DS_Store
+/.idea/
\ No newline at end of file

.travis.yml

+language: java
+
+jdk:
+  - openjdk6
+  - openjdk7
+
+before_script: cd h2
+
+script: ./build.sh jar