Use targets when possible for include commands

[RFRIEDM-Trimble]

• For including directories, use target_include_directories

This is part II of the fixes for #245

[gbiggs]

Although I see now specific problem with these changes, I do question their value: polled_camera is not built for ROS 2.

[ahcorde]

The polled_camera package is not built in ROS2, there is a COLCON_IGNORE file in the package. Closing this for now