Anubis / Anubis

Implementation of 'describe' paragraphs complete.

… a multiple variable.

Syscalls for Nat and Word? are not yet implemented.

Updated the primitive 'set_environment_variable', which was not implemented.

it is enlarged (serialize.cpp: the macro 'check_serial'). Modified 'description.text'
accordingly.

Added some messages in sdbms.anubis and safe_save_retrieve.anubis (to be dropped later).

Introduction of 'cursors'.
Type SQLite3Datum introduced (INTEGER, FLOAT, TEXT, BLOB, NULL).