Use original sign and verify functions as default

[torntrousers]

Fix for #42

[github-actions]

Memory usage change @ a2b5706

Board	flash	%	RAM for global variables	%
arduino:megaavr:uno2018	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkr1000	💚 -96 - 0	-0.04 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrgsm1400	💚 -88 - 0	-0.03 - 0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/SHA1 flash	%	examples/SHA1 RAM for global variables	%	examples/SHA256 flash	%	examples/SHA256 RAM for global variables	%	examples/WiFiSSLClient flash	%	examples/WiFiSSLClient RAM for global variables	%	examples/MKRGSMSSLClient flash	%	examples/MKRGSMSSLClient RAM for global variables	%
arduino:megaavr:uno2018	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkr1000	0	0.0	0	0.0	0	0.0	0	0.0	-96	-0.04	0	0.0
arduino:samd:mkrgsm1400	0	0.0	0	0.0	0	0.0	0	0.0					-88	-0.03	0	0.0

Click for full report CSV

Board,examples/SHA1<br>flash,%,examples/SHA1<br>RAM for global variables,%,examples/SHA256<br>flash,%,examples/SHA256<br>RAM for global variables,%,examples/WiFiSSLClient<br>flash,%,examples/WiFiSSLClient<br>RAM for global variables,%,examples/MKRGSMSSLClient<br>flash,%,examples/MKRGSMSSLClient<br>RAM for global variables,%
arduino:megaavr:uno2018,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkr1000,0,0.0,0,0.0,0,0.0,0,0.0,-96,-0.04,0,0.0
arduino:samd:mkrgsm1400,0,0.0,0,0.0,0,0.0,0,0.0,,,,,-88,-0.03,0,0.0