Bug 1093172 - Add CONTENT_STATUS column to reading list table. r=rnewman

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extra : rebase_source : d875e124750e6d8edb3458336c6ed737aa2324aa
Bug 1093172 - Add status when adding reading list item from Reader.js. r=rnewman

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extra : rebase_source : ab1793ee80415c6e09028c757acd43d31426c2d4
Bug 1093172 - Add test to check default status of inserted items. r=rnewman

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extra : rebase_source : bca2e7843c2f5cb1ef9fc32c8004c7115aa65872