CoRC v0.1.0

• Rebase on latest COPASI development sources.
• Add model event functioniality (event(), event_strict(), getEvents(), setEvents(), newEvent(), deleteEvent()).
• The package now generally uses "" instead of NA to denote unset or empty expressions.
• Allow expressions to be automatically coerced from finite numeric and logical values. E.g. getValue(1) instead of getValue("1").
• Fix crashes on entity deletion. Deletion functions now delete recursively.
• Generally warn if model fails to compile.
• Fix errors with argument type of setCompartments() and setGlobalQuantities().
• Use new Copasi XML parser.