Merge pull request #16 from mlosch/master

Add Odometry node. Low pass filters for IR sensors
change from loop with spinonce() to just spin()
remove unused function
Merge pull request #17 from mlosch/master

add convenience scripts for connecting to robot
add mapping package
first testworthy version
tf fixes
visualisation fix
visualisation fix
Merge remote-tracking branch 'upstream/master'
Merge pull request #19 from tobiasandersson/master

first version of mapping
publish transform in odometry
Merge remote-tracking branch 'upstream/master'
update gitignore