unixification of code and somes fixes

Hi,

I just received my bioloid premium. Thanks to pydynamixel I can play with it in python.

In the new kit there is no longer usb2dynamixel, you use the CM-530. I fixed the library to be able to handle it : simkim@0d88a38.

A typo has been left in code in original library (current svn on google code) : simkim@be26afb
It's mandatory to use wheel mode as cw and ccw angle limit need to be changed.

You may want to cherry pick this two commit and ignore other changes (warning, I changed files to unix end of line)