Version 1.2

* Split simtheo.h into libsimtheo.h and libsimtheo.c to allow static/dynamic library compilation and linking
* Ported code to Linux Raspberry Pi 1, 2 and 3 (ARMv6h, ARMv7h, and ARMv8, assumed if -mmcu is not equal to attiny1634)
* Created makefile to make compilation to static and dynamic libraries easier
* Removed 600 ms delay after letter_to_morse - causes issues with my game responsiveness
* Fixed buffer overflow error if key was repeatedly hit past 4 elements
* Removed MORSE_FLIP macro
* Disabled LED/sound interval flipping when morse_echo or morse_replay is disabled
* Added several ATtiny 1634 macros to allow architecture-specific define statements for Linux compilation:
** Replaced pgm_read_byte(&<variable>) with PGM(<variable>) 
** Replaced TCCR1B |= (1 << CS10) | (1 << CS12) lines with START_MORSE_TIMER macro
** Replaced TCNT1=0 with CLEAR_TIMER macro
* Added several Linux ARMv8 macros to mimic ATtiny functions:
** Created _delay_ms(), _delay_us(), and TCNT1 macros to mimic ATtiny delay functions and 16-bit timer
** Stripped out PROGMEM and volatile keywords for Linux compilation

Version 1.1

* Removed 1 second delay after replay - the morse_echo and morse_replay variables handle this externally
* Corrected error in documentation from SIMTHEO SSH TO SIMTHEO SHH

