Windows, because xrange uses 32bit integers and __getslice__ gets 64bit integers

Changed policy on handling exceptions during ZCML parsing in ``Products``. We no longer catch any exceptions in non-debug mode. These days most products won't actually do anything useful if their ZCML is not loaded - it's no longer helpful to pretend to get a working instance. We'd rather fail early and visible.

Added a new BooleanIndex to the standard PluginIndexes, sponsored by Jarn AS and based on work in the Products.BooleanIndex distribution.

Fixed ``testZODBCompat`` tests in ZopeTestCase to match modern ZODB semantics. There is no explicit contract for the time _v attributes actually get removed. The tests in question where bogus, as they didn't test database load but a class variable not affected by the transaction machinery. There's other tests in the same module testing more abort semantics that have a proper demo storage setup.

Updated to zope.testbrowser = 3.10.1 and make sure we keep the new mechanize, even though it will be downgraded in ZTK 1.0c2 to support Python 2.4