enable use industrial_ci in mROS

[hakuturu583]

Now, you do not use CI, so you cannot guarantee work mROS.
I add .travis.yml in order to check building mROS.

[takasehideki]

@hakuturu583 Thank you so much for a cool proposal!
We surely understand that it is important to support CI testing. However, we should consider following issues to support it since mROS operates on a real embedded board.

1. cross-compiler (arm-none-eabi) is needed to build mROS apps
2. operation test on real environment (mROS GR-PEACH & ROS laptop) is needed
3. support for ROS catkin_tools is needed

Please let us know if you have a good solution or suggestion.

[takasehideki]

For 2., we can use athrill for the simulation of mROS as alternative testing environment.
https://github.com/tmori/mROS_athrill

Since mROS_athrill targets on V850, we still use cross-compiler.

[takasehideki]

For 3, we have not responded to catkin_tools.
We offer some examples as the distributed systems.
ros_catkin_ws/ is the workspace for ROS apps. It is responded to catkin environments.
mros_ws means the workspace for mROS apps of examples. In these dirs, we independently build apps by traditional Makefile.