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).
Merge pull request #59 from glenebob/bytea_backend_text_decoder

Bytea backend text decoder
Add missing file reference to VS.net 2008 and 2010 project files after pull request #57 commit.
fix bug for value checking of MinPoolSize
Merge pull request #53 from ChenHuajun/minpoolsize_bugfix

fix bug for value checking of MinPoolSize