Latest version of Pyrrho 6.2

This version fixes a number of long-standing bugs in Pyrrho, including the following significant areas:

• Exit handlers
• Check constraints
• Triggers
• OSPStudio
• Row count

The Java Connector (PyrrhoJC) is also being fixed for Java SE, and more changes are expected.
In addition, some syntax error messages have been made more helpful. Many thanks for those who have submitted performance reports - I have tried your patience by taking so long to fix them.

Please send me details of any problems you find (malcolm.crowe@uws.ac.uk).