Classes for PublicKey and Signature

[igormcoelho]

Closes #989

[codecov-io]

Codecov Report

Merging #990 into master will increase coverage by 0.03%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master    #990      +/-   ##
=========================================
+ Coverage   53.77%   53.8%   +0.03%     
=========================================
  Files         194     196       +2     
  Lines       13251   13290      +39     
=========================================
+ Hits         7126    7151      +25     
- Misses       6125    6139      +14

Impacted Files	Coverage Δ
neo/Cryptography/PublicKey.cs	0% <0%> (ø)
neo/Cryptography/Signature.cs	0% <0%> (ø)
neo/Ledger/StorageKey.cs	64.1% <0%> (-1.12%)	⬇️
neo/SmartContract/InteropService.NEO.cs	26.74% <0%> (+1%)	⬆️
neo/IO/Caching/Cache.cs	100% <0%> (+1.87%)	⬆️
neo/SmartContract/Native/Tokens/NeoToken.cs	53.21% <0%> (+5.8%)	⬆️

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[lock9]

Where are these classes being used? Shouldn't we have some tests too?

[igormcoelho]

Still under discussiin @lock9

[shargon]

Is ok to me

[erikzhang]

Can we close this PR? I think it is a big project to completely replace all public keys and signatures.

[igormcoelho]

Ok, the idea remains, for the future. I think it's very important for readability.