STLplus C++ library collection SVN stlplus3

Added Visual Studio project for this library

Fixed indentation and updated copyright notice

Incorporated print-out using strings library

Fixed typo

Header to include whole library in one go

Eliminated a compiler warning on Unix versions due to a static function only being used in
Windows version

More consistent template parameter names

#include the persistent class

Throw an exception in const version of [] if key not present

Consistent use of the TYPENAME macro, throw an exception in const version of
[] if key not present