Moved to library
Added new (optional) arguments to begin where you can set PA level and radio channel in sketches and gateway.  Default values for constructor and begin arguments also made it possible to simplify all sketches when using defualt ce/cs pins (9,10) for radio  and AUTO radion Id mode.
Adding git attributes for handling lineendings
Example of a battery powered sensor sending in battery level value in percent.
Default channel should be 76 (not the presumed 70)
This example is not yet aopted to MySensor. But could be a good inspirations for how to receive 433Mhz stuff.