prepare for release 315.1.9
"315.1.9"
(.travis.yml) add rosbuild/deb test
add PKG_CONFIG_PATH for rosbuild environment
fix rosbuild compile option for working both deb/source
(CMakeLists.txt) fix conf file path for deb/rosbuild environment
Merge pull request #55 from k-okada/add_rosbuild_rostest

Add rosbuild/deb test
add Isaac to maintainer