Initial Dmap changes.
Structs for fabric GPIO, SPI controller and I2C controller.
SPI logic.
Some upper level MUX logic.
I2C logic (no locking yet).
Add multi-process support for Win32 I2C.
Added initial (not yet thread-safe) logic to modify the state of a bit on an I/O Expander.
Move methods from I2cController.h to .cpp.
Merge pull request #45 from JustAddWires/DMap

Direct map support coming soon.