[WCM] Document PhpSessionStorage#2474

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weaverryan merged 6 commits intomasterfrom

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Apr 27, 2013

Commits on Apr 6, 2013

Document PhpSessionStorage
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Update index
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Added nortes as per @stof's recommendation.
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Style fixes
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Commits on Apr 13, 2013

Sync with PR class name change.
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Add cookbook entry.
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