Compilation errors and minor fixes

After cloning the github RFBee repository and opened it in Arduino IDE, the RFBee_v1.1.ino wanted to be moved to new directory. I know there probably won't be a new version, but there is no point in hardcoding the version into the file name.

I also updated the HW version, since the RFBee I got is v1.1

I also fixed couple of compilation errors I got when verifying the sketch in the Arduino IDE.