adding: #define STICKBREAKER

[everslick]

I have to regularly switch between the origin:master and your fork, but the I2C API is incompatible. would you mind sneaking in a #define STICKBREAKER in Wire.h so I can automagically switch between code branches? This is only required until your changes are merged upstream of course. or is there another way to detect the API version?

[stickbreaker]

@everslick thats fine, I'm cleaning up the current code and adding support for the second hardware I2C.

Chuck.

[stickbreaker]

Done