[ANN] MetacelloBrowser 1.59.2 released

Fixed a couple of issues:
  - fix ssue 133: MetacelloBrowser: Abstract test not indicated
    http://code.google.com/p/metacello/issues/detail?id=133
  - fix Issue 132: MetacelloBrowser: Register in Squeak World menu
    http://code.google.com/p/metacello/issues/detail?id=132

Thanks Tobias, for taking the MetacelloBrowser for a spin...

Dale