[Bugs] #2143 UNSP: add spiral to home view

[Sugar Labs Bugs]

#2143: add spiral to home view
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    Reporter:  walter                     |          Owner:  tomeu                      
        Type:  enhancement                |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  sugar                      |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:  r?                         
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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Changes (by walter):

  * keywords:  r! => r?


Comment:

 http://bugs.sugarlabs.org/attachment/ticket/2143/0001-adding-spiral-
 extension-to-Ring-View.patch

 While I didn't split the code into two classes: one for spiral and one for
 ring, this version is much less complex and does not not rely on any state
 maintained in the class except for one flag.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/2143#comment:9>
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