windows declspecs for message filters.
add macro file for the message filters desclspecs.
process killer for windows.
Merge pull request #191 from ros-windows/roslaunch-process-killer

Process killer for windows.
Merge pull request #190 from ros-windows/message-filters-windows-port

Message filters windows port
1.9.43
Bugfix reference to init ROS_MASTER_URI [windows]
Merge pull request #193 from stonier/patch-2

Bugfix reference to init ROS_MASTER_URI [windows]