A-code parser

## A-code command parsing Sorry, this document is still under construction! Identifying words: all forced to lower case; automatic abbreviations and error correction (see the vocabulary document for details). Basic command: "verb" or "verb noun". The AGR1, ARG2 and STATUS variables and their values (including error values). Default object. Description scanning for missing vovabulary words Multiple commands per line: separators '.' (full stop), or ; (semicolon) or the word then. Explicit object iteration: separators ',' (comma) or the word and. Implicit object iteration: the DOALL directive. The except syntax. Uses of it. The again (or repeat) verb. On is own and in a multiple command line. Attempted disambiguation. Error handling.