Squashed 'Telerik.Sitefinity.Samples.Common/' changes from 74d36c5..c1961d3

c1961d3 Fixed blog posts duplicate creation on system restart

git-subtree-dir: Telerik.Sitefinity.Samples.Common
git-subtree-split: c1961d3b2072a651f6b65a2ab778569c0ee8497f
Merge commit '451306dadb9d0fa357886fdd87f769778e2e16ec' into review
Added StyleCop integration