Optimized uart jump table entries
Optimized the pwm generator
Refactored pwm_step to macro (optimization)
Refactored uart_rx to macro (optimization)
Optimized for double PWM rate and 19200baud.
**** BIG FAT WARNING ****
- The ISR corrupts the STATUS register, this register can not be used
  by the main loop anymore.
- The ISR also requires the PCLATH register to remain 0x00, so this
  register may not be modified by the main loop.
- Finally the ISR requires that Bank 0 is selected at all times.
- Refactored main.asm
- Changed default color to black
- Added startup flash, as startup diagnostic
- Added test stimulus files for 19200 baud
Fixed mainloop calling startup after line error
Fixed period not changing
Fixed issue that required 2 stop bits
Merge branch 'dirtyfast' of https://github.com/Gabriel-LG/Ambioder into dirtyfast