* [ANSI_EXT,NEW] Added variant if ansi_format/2 (both ANSI-Format and Format-Arguments).
* [ANSI_EXT,FIX] Added determinism.
* [RUN_EXT,FIX] list_external_programs/[0,1] now works.
* [RUN_EXT,SC] Simplified code for opening DOT files (OS-independent).
* [RUN_EXT,SC] Simplified code for opening PDFs (OS-independent).
* [RUN_EXT,EXT] Added programs for opening PDF files (OS-dependent).
Added support for generative number handling and related changed.
These additional are made in the context of implementing the generative case for the RFC 2396 DCG.

* [DATETIME_EXT,SC] Relocated seconds/3 from module MATH_EXT.
* [DCG_CARDINAL,EXT] The number DCGs should also work for the generative case (using a feature argument).
* [MATH_EXT,SC] Relocated and removed several predicates.
* [META_EXT,FIX] Regression in generic/3. I'm still not sure how to treat this meta-predicate... The modifier nor base is a meta-predicate proper (in the sense that neither exists seperately).
* [META_EXT,SC] Relocated default/3. Was too generic for module MATH_EXT.
* [QCAL,SC] New module intended to contain a qualitative calculus. Currently contains sign_multiply/3.
* [RADIX,NEW] New module for converting numbers with a different radix. This is used by DCG_CARDINAL. Currently only whole numbers are supported.
* [RFC_2396,EXT] Added yet more feature handling for the generative case. Still not completely supported...