Move headers to include path, rename to follow ROS style.
Add namespaces to headers, swap ROS thread to foreground.
Merge branch 'indigo-devel' into fix-headers

Conflicts:
	rosserial_server/include/rosserial_server/session.h
	rosserial_server/include/rosserial_server/topic_handlers.h
Merge pull request #131 from ros-drivers/fix-headers