Merge pull request #20 from k-okada/master

maxmum paralell jobs is set to 4 to avoid travis fail
Initial commit of CHANGELOG.rst
Fix to https://github.com/start-jsk/hrpsys/issues/25 and also other building issues that seem to be rooted in openhrp3.
Merge pull request #21 from 130s/master

Fix to https://github.com/start-jsk/hrpsys/issues/25 and also other building issues that seem to be rooted in openhrp3.
Update CHANGELOG.rst for 3.1.5-3
add test code to catch if pkg-config openhrp3.1 does not work well, also fixed install process PROJECT_SOURCE_DIR -> CMAKE_INSTALL_PREFIX/share/openhrp3