Fixed (again) BestArgument in Argument.fx
gui: argument circles working
gui: complement acceptability attribute checkbox added and SE&DV standard have +/- signs in the argument nodes
gui: webstart image added
gui: nimbus working
removed a bug in the char-set:s function
fixed some incompatibilities
fixed some incompatibilities with the srfi format.ss
Fixed bugs in the Porsche example and the KnowledgeTools example.
gui: text field heights adjusted to nimbus
Completed porting some examples to R6RS.
Moved the INSTALL and CHANGES files to the scheme directory, since they apply only to the Scheme library.
Fixed a bug in one of the examples.
changed the syntax of ontology
ontology now with new syntax
Implemented a version of immutable tables in pure R6RS scheme, by copying hashtables. Presumably not be very efficient.
Fixed a couple of minor bugs ... again. Should have been commited previously.
Fix a couple of R6RS bugs in the examples.
removed a bug in strings.sls and statement.ss
Added "preponderance of the evidence" and "beyond a reasonable doubt" proof standards to Argument.fx.  Changed the default weight of arguments from 50 to 0.50.