settlerlib: added interval support for signals with zero channels (empty chains)
chain sensor: added support for additional absolute translation variance
interva_calc: removed non-standard 'typeof' operator
cov_est: added ctrl+c handling
cov_est: show xyz/rpy for non-urdf transforms
Merge branch 'master' of github.com:ros-perception/calibration
checkerboard: changed parametrization so that it is by default rotated correctly (not 180deg around x), and the origin is in the center instead of the bottom-left corner
error visualization: plot projected coordinates, not deltas (those didn't work due to mismatching order of points in the arrays)
opt_runner: publish markers with current pose estimates during optimization
calibration: buidtool_depend on catkin
Merge pull request #17 from dgossow/master

Added support for empty / low-dimensionality chains
Merge branch 'master' of github.com:ros-perception/calibration into hydro-devel-fork
made corner 0+1 of checkerboards green
[bugfix] use floats in checkerboard center calculation