[Trac #1251] Include improved calculator

[Zarro Boogs per Child]

#1251: Include improved calculator
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 Reporter:  rwh            |        Owner:  jg 
     Type:  enhancement    |       Status:  new
 Priority:  normal         |    Milestone:     
Component:  new component  |   Resolution:     
 Keywords:                 |  
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Comment (by bert):

 Tested the latest, works okay, looks okay, is a vast improvement over the
 current Calculadora - please include immediately!

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Ticket URL: <http://dev.laptop.org/ticket/1251#comment:4>
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