install build directory using setup.py in original source tree
add test code for rtshell
fix catkin_make install error, now src/rtshell/share directory is not exist
check if catkin_make works, previous commit fail to install
install under dist-packages, not site-packages
add test code for rtshell
Merge branch 'add_test' of https://github.com/k-okada/rtshell_core into add_test

Conflicts:
	.travis.yml
Merge pull request #4 from k-okada/add_test

add test code for rtshell for issue #2