More flexibility for single URL captures#2

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joelcox wants to merge 3 commits intommoulton:masterfrom

Commits on May 5, 2013

Modified code base so screenshots can be put in specific files, rather than auto generated.
joelcox
committed
A URL can now be specified as a string, rather than an array.
joelcox
committed

Commits on Jun 11, 2013

Added zoomFactor to fix some weird Windows bug.
joelcox
committed