when refreshing, stellar needs to use updated data-background-ratio#99

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spapin wants to merge 2 commits intomarkdalgleish:masterfrom

spapin:master

Commits on Jul 1, 2014

changed the source for background ratio so that it has the correct value is used if the attribute is modified after stellar is first instanciated.
spapin
committed
added failing test: 'support refreshing the background ratio'
spapin
committed