force torque working commit.
contactSensorTest now passes.
resolve default argument redefinition compiler errors.  fixes #290.
Merge pull request #293 from patmarion/drakeGradientUtil-fixup

resolve default argument redefinition compiler errors.  fixes #290.
Merge pull request #287 from mposa/master

ContactForceTorqueSensor update
move contact force sensors back out of dev
resolves multi-frame indexing bug #291
Adds minimum version arg when finding octomap

Also updates the cmake submodule to get the two-argument form of the
pods_find_pkg_config macro.
Merge pull request #297 from avalenzu/octomap-version

Adds minimum version arg when finding octomap
Merge pull request #294 from RussTedrake/multiframe

fixes multi-frame frame_id logic bug
fixed time-stepping gradient computation for position control case
Check for 'package://' syntax and warn once

URDFRigidBodyManipulator presently does not support the 'package://' syntax for
specifying mesh filenames. Rather than spam the user with a warning for each
mesh file, we now warn once per urdf that uses that syntax.
Re-enable building of urdf_collision_test

Also fixes the executable name in the usage message for urdf_collision_test.
Merge pull request #299 from avalenzu/fix-URDFRigidBodyManipulator-warnings

Fix urdf rigid body manipulator warnings
Merge pull request #298 from kuindersma/fix-position-control-gradients

fixed time-stepping gradient computation for position control case