Request for review of gh/serial

[GoogleCodeExporter]

Purpose of code changes on this branch:

Introducing a way to access the Arduino serial interfaces.

When reviewing my code changes, please focus on:

There are several things that should be carefully checked:
* As we have had all sort of different problems getting this going, please 
verify the functionality.  It works here with Arduino 1.0.
* There are API differences between Arduino 0.x and 1.0.  This is a potential 
source of our problems, if this is the case should we pursuit compatibility 
with both?
* Should we have separate ros messages for the different serial interfaces, or 
should they be combined to minimize the different messages?
* Currently the configuration is done with the set_poark_config message.  To 
fit the baud setting, it was split.  Is this acceptable, or is it better to 
adapt the message or introduce a new message?  

After the review, I'll merge this branch into:
master

Original issue reported on code.google.com by hendeby@gmail.com on 16 Jan 2012 at 10:54

[GoogleCodeExporter]

Thanks for the review of the version one of the CL.

I have pushed an updated version that should address all the issues raised.  
Please have a look at the new commit at gh/serial-2.

Original comment by hendeby@gmail.com on 19 Jan 2012 at 9:14

[GoogleCodeExporter]

Original comment by hendeby@gmail.com on 22 Jan 2012 at 2:34

• Changed state: Fixed