COPASI: Support/Change History/COPASI 4 2 23 development

Metabolites may now be changed through arbitrary ODEs and assignments.
Compartment volumes may now be dynamically changed through ODEs and assignments.
SBML support for import and export of all assignment and rate rules.
New tool to check rate laws for inconsistencies and errors

Fixed bug which changed the performance statistic of the optimization task each time the result was redisplayed.
The validity of the objective function for optimization is now checked before task execution to avoid unnecessary task execution.
Fixed SBML import problem when encountering negative numbers in assignment or rate rules for model quantities.
Fixed SBML export problem which occasionally created rules for unspecified parameters.
Fixed several minor problems in the table displays of compartments, metabolites, reactions, etc.
Fixed crash which occasionally was triggered by deleting a parameter.
Improved results of the Levenberg Marquard optimization method for problems with bounded parameter space.
Fixed crash which rarely occurred when executing the convert to irreversible tool.
Improved convert to irreversible to tool to better detect the negative and positive parts of a kinetic law.
Improved layout of tab widget an Mac OS X
Fixed problem on Mac OS X, which prevented to zoom out of plots.

COPASI 4.2.23 (development)