revise program startup
flash MIDI LED on RXC, blink after watchdog reset
implement wipeProgram() and wipeBank()
more meaningful tremolo enum value names
update LEDs when entering program
implement handling of MIDI bypass command
define macros for desired timer frequencies
fix LED timer configuration procedure
remove unnecessary elements in leds.c
some essential fixed point math functions
add simple test program for fixed math library
implement PWM and service procedures for volume LED
implement volume computation based on attenuation and volume pedal