v1.1 -> v1.2

ArsBaseClass:

- added support for multiple ARS sessions for a single class or object
- the default ARS user/password/server can be set in the 'use' command
  of any subclass, or of ArsBaseClass
- generic query method added which is accessible from subclasses
- added methods setField() and setFields()
- added reload method to resent object from ARS

(see module for details)

ars-gen-subclass:

- old subclass modules can be updated
  - there is a mechanism for preserving customization
    (see the script for details)

v1.0 -> v1.1

- added delete() method
- added support for attachment fields.
- bug fixed