A mulfunctioning *features* feature

[Marek Rychlik]

A number of *features* switches control the behavior of the package. The default set of switches set up in make-cgb.lisp or cgb.asd results in correct behavior, but compiling the package without switches results in an error. To reproduce the behavior, one should:

• Comment out the (pushnew ... *features*) forms and load the package.
• Load the system using (asdf:operate 'asdf:load-op 'cgb)
• Switch package: (in-package :cgb-lisp)
• Run all built-in examples: (all-examples)

The package will fail in string-grobner-system.