Fixing bug reading unnamed chars at eof. Adding support for R7RS extended char names.
Fixing bug reading unnamed chars at eof.
Adding support for R7RS extended char names.

norton/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme,holmescn/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,norton/chibi-scheme,holmescn/chibi-scheme,holmescn/chibi-scheme