compile_collada_model now create dependency tree automatically, so we don't need to make dependency in user-space cmake
update comment and README.md
Merge pull request #21 from YoheiKakiuchi/add_description

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#25: make the target to genertate urdf file depend on dae file
#25: Merge branch 'master' into garaemon-fix-twice-compilation-for-urdf-model-id-25
#25: depends hrpsys_gazebo_tutorials on hrpsys_ros_bridge_tutorials. and
executes each urdf generation after compiling hrpsys_gazebo_tutorials
by using ${compile_robots} targets
#25: merge .rosinstall intead of call wstool set directly on travis
#25: clean up repositories to be used on travis
#25: rename manifest.xml to manifest.xml.bak before running rosdep
#25: add jsk_roseus on travis
#25: add .git to repository urls
#25: install pr2-controllers on travis
#25: do not specify ROS_PARALLEL_JOBS
#25: 4 parallel compilation on travis
#25: update .travis.yml, almost copied from rtmros_tutorials
#25: build test for groovy
#25: fix mongodb apt install error on travis
#25: install drcsim
#25: add osrf drc apt repository
#25: use hrpsys-base rather than hrpsys as the package name