RSA key generation now uses native iOS APIs.
Implements RSA encryption/decryption on iOS.
Fixes RSA decryption on iOS.
Implements RSA KeySize on iOS.
Tries to implement RSA signatures on iOS, although at this point the tests are still failing.
Fixes StyleCop issues.
Adds build steps to apple projects across all solution platforms and configs.
Reduced size of signature buffer to what it should seemingly actually be.
Uses constants instead of magic strings.
Simplifies key gen code.
Exporting of RSA private and public key data seems to be working.
We just need to get it formatted in some interoperable format now.
101/106 tests passing on iOS.
Adds placeholder tests for signature interop.
Adds public key X509 import/export.
iOS private and public keys are importable and exportable.

The test runner crashes while decrypting from an imported private key. The KeyPairRoundTrip test is failing now anyway so I think the problem is that importing private keys still has a bug in it.
Cleaned up most StyleCop issues.
Fixes remaining StyleCop issues.
All iOS tests pass!
Adds Capi1 import/export support for key pairs in iOS, but the test fails.
Replaces ReverseMemory method with Array.Reverse.