[dev-crypto-csharp] Porting BC to WP71, WP80, Android (xamarin flavour) and starting and adding support for PGP with ECC (RFC 6637)

[Sascha Kiefer]

Hello everybody,

i just wanted to say Hello and tell you about my clone of
BouncyCastle.Crypto

https://github.com/esskar/BouncyCastle.Crypto

I did some cleanup, performance enhancements, and adding solutions for
different plattforms.
I also started implementing RFC 6637 (support for ECC in PGP).

Comments and suggestions are appreciated.

Cheers,
--esskar