Initial commit of freemodbus and code by Anson and me
Moved rfid functions into their own file
Added ability to read input registers
Got rid of annoying warning about usTimerOCRBDelta
Added ATtiny1634 write to UCSRC in portserial.c
Moved toolbox code into its own directory
Added script to read from rfid reader
Initial commit of mainbox code.
Added capability to read/write coils to toolbox
Renamed tool_get_user to tool_read_user
Added actual control of tool
Made some changes to the tool state machine
Fixed problem with high error in serial clock
Deleted accidently commited vim swap file
Removed superfluous printf in rfid read script
Changed register/coil addresses to be 1 indexed
Fixed U2X1 being set in the wrong control register
Added RTS_ENABLE to Makefile

Also added UL to end of F_CPU
Various fixes to tool main.c

- Input register callback no longer copies current_user to reg_buf
  prematurely, and then write the uninitialized serno into reg_buf (?!)
- tool_disable was missing a ~
- Updated coil read/write to use new 1 indexed addresses
Added printing the response timeout, and other fixes

- Fixed using SLAVE_ADDR instead of tool->address
- Replaced read_registers with read_input_registers