Upgrade for PHPLIB's templates.inc w/ session support

First file relase for PHPWidgets! is a patched up version of template.inc!
\<br>
for PHPLIB, this one includes \<b>full support for sessions\</b> (no need to purl
the links, so Get mode will work), along with support for \<b>variable exists\</b>
block structures... i.e.
\<i>
\<!-- IF my_var -->
Your variable called my_var exists and has a value of {my_var}
\<!-- ELSE my_var -->
my_var was not found
\<!-- ENDIF my_var -->
\</i>
\<br>
This update applies to PHPLIB 7.3.
It was built on a Debian 2.2 Linux box w/ PHP 3.0.16 and
the PHPLIB7.3-dev3.1 deb package.