[Bugs] #2235 UNSP: improvements to spiral home view

[Sugar Labs Bugs]

#2235: improvements to spiral home view
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    Reporter:  walter                     |          Owner:  walter     
        Type:  enhancement                |         Status:  new        
    Priority:  Unspecified by Maintainer  |      Milestone:  0.90       
   Component:  sugar                      |        Version:  Unspecified
    Severity:  Unspecified                |       Keywords:             
Distribution:  Unspecified                |   Status_field:  Unconfirmed
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 Closing #2143 and opening this ticket to incorporate the modifications
 recommended by the design team.

 The new patches are divided into two parts:

 (1) improvements to the basic ring layout that get inherited by all of its
 subclasses
 (2) introduction of a new class that incorporates the spiral int the ring.

 Note that in the 2nd patch in order to have the ring that morphs into a
 spiral become the new default without having to modify the user's .gconf
 settings or favoriteview.py, I have renamed the RingLayout class to
 BasicRingLayout and use the name RingLayout for the spiral and I use the
 ring-layout key for the new class.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/2235>
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