ByteaTextToByteArray conversion optimization
Formatting
Formatting
Formatting
Headers formatting
Bytea backend to native hex format decoder

Optimize the hex format decoder to work directly on the byte[] backend data.
Fix bug causing output byte[] to be one extra byte in length.
Bytea backend to native escape format decoder

Optimize the bytea escape format decoder to operate directly on the byte[].
Fix bug in escape format encoder (missing digit 7 in the lookup array).
Refactor NpgsqlTypes files

There should be no functional changes in this commit.
Split NpgsqlTypesHelper.cs and NpgsqlTypeConverters.cs into more managable pieces.
Move ASCIIByteArrays to ASCIIBytes.cs.
Move unused messages under NpgsqlTypesHelper.cs to Messages.cs.
Comments, file encoding

Changed a few file name comments and a copyright date.
Changed file encoding of FastConverter.cs to match that of oither files; it had a BOM which is unneeded for code files.