[Trac #562] add rotation support to xbook

[Zarro Boogs per Child]

#562: add rotation support to xbook
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 Reporter:  ywwg         |       Owner:  blizzard
     Type:  enhancement  |      Status:  new     
 Priority:  normal       |   Milestone:  BTest-2 
Component:  distro       |    Keywords:          
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 These patches add rotation support to xbook, the better to read ebooks
 with.

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Ticket URL: <http://dev.laptop.org/ticket/562>
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