Fixed a bug where I put the wrong slot name for header span declarations
Fixed a bug in define-header-spans

I had marked the type of the file-line to be header when it should be heading.
This has been fixed.
Added support for shrinking header-spans to the appropriate size
Modulized the GLConstantConversion expert system

This makes the set of rules cleaner by not continually relying on salience
values to order the rules. The modules to it instead
Fixed a bug where I put multifield instead of multislot
Fixed more bugs in GLConstantConversion.clp