these examples should be bytes to be consistent with other loaders
expand pkcs1 loader to load PKCS1 v1.5 and PSS signature examples
sign/verify
add docs
add padding
a bunch of PKCS1/PSS tests + todos
updates to match the interfaces that landed
hexlify things less stupidly
further stupidity reduction
flatten pkcs1 tests for parametrization
bytes and strings, two great tastes that go great together
copy hash ctx inside sign/verify to avoid use after finalize
move padding checks
add 0.9.8 support for PKCS1 v1.5 signatures.

skip PSS for now on OpenSSL < 1.0.0