Add ClearProgram function to SignalGP hardware

[mmore500]

I assume this also requires resetting hardware or bad things might happen? This functionality is useful if you want to have persistent traits, but need to be able to reset everything else.

[codecov]

Codecov Report

Merging #209 into master will increase coverage by 0.21%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #209      +/-   ##
==========================================
+ Coverage   65.34%   65.55%   +0.21%     
==========================================
  Files          95       95              
  Lines       13203    13223      +20     
==========================================
+ Hits         8627     8668      +41     
+ Misses       4576     4555      -21

Impacted Files	Coverage Δ
source/hardware/EventDrivenGP.h	54.35% <100%> (+0.23%)	⬆️
tests/test_hardware.cc	100% <100%> (ø)	⬆️
source/hardware/AvidaGP.h	48.34% <0%> (+0.94%)	⬆️
source/tools/math.h	76.42% <0%> (+3.25%)	⬆️
source/hardware/AvidaCPU_InstLib.h	85.29% <0%> (+14.7%)	⬆️

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[amlalejini]

Yup! This looks like useful functionality to have. You're right about needing to reset the hardware. If we didn't, instruction pointers would still be pointing to now invalid places in the hardware's program.

[amlalejini]

See my previous comment!