Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_common
specify the version of python-twitter
Merge pull request #477 from garaemon/fix-python-twitter

Fix python twitter
added codes to remove c2/c3 topics
Merge pull request #478 from YuOhara/ohara_new_branch

added codes to remove c2/c3 topics
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_common
add tool to check the existence of ros nodes and publish them to diagnostics
Merge pull request #479 from garaemon/ping-to-check-existence-of-node

a script to ping to check existence of node
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_common
add constant variables to ExecFootsteps to specify resume/overwrite the
plan to execute
Merge pull request #480 from garaemon/update-message-to-send-resume-footstep

Update message to resume footstep
update CHANGELOG.rst
1.0.30
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_common
add class to measure and accumurate time to jsk_topic_tools
Merge pull request #482 from garaemon/add-utility-to-measure-time

Add utility to measure time
update CHANGELOG.rst
1.0.31
Merge branch 'master' of https://github.com/jsk-ros-pkg/jsk_common