[Utility/SHA] Added SHA.sha256(String/File/Byte[])->String
[Utility/SHA] Added SHA.sha256(String/File/Byte[])->String

- Returns the SHA256 hash of a sequence of data.
- The SHA256 of a String uses the UTF-8 bytes of that string.

EXAMPLE USAGE
  uses Utility/SHA

  println SHA.sha256( "" )
    // E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855

  println SHA.sha256( "hello world" )
    // B94D27B9934D3E08A52E52D7DA7DABFAC484EFE37A5380EE9088F7ACE2EFCDE9

  println SHA.sha256( Byte[][...] )
  println SHA.sha256( File(...) )

Plasmaworks/Rogue,AbePralle/Rogue,Plasmaworks/Rogue,Plasmaworks/Rogue,Plasmaworks/Rogue,AbePralle/Rogue