Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_common
add lightweight nodelet throttle skelton cpp/header file
implement lightweight nodelet throttle
read update_rate from the parameter ~update_rate
add xml declaration for nodlet plugin
fixing dependency for nodelet usage

depends to nodelet on manifest.xml, package.xml and catkin.cmake
compile nodelet on rosbuild too
publish data only if any subscriber is
add a sample launch file for LightwehgitThrottle
add test code for LightwehgitThrottle
update documentation of nodelet xml
add rostopic dependency to run test for LightweightThrottle
Merge pull request #357 from garaemon/nodelet-throttle

Nodelet throttle