removed AnkhSVN perSolution section from sln file

AnkhSVN adds a preSolution section to the solution file which prevents
Visual Studio 2012.2 from using the Git Source Control
Fixed typo JsonPretty.FormatAsJsom to JsonPretty.FormatAsJson
Merge pull request #4 from iamcharliegoddard/RemoveAnkhSVNPreSolution

removed AnkhSVN perSolution section from sln file
Merge pull request #5 from iamcharliegoddard/JsomTypoFix

Fixed typo JsonPretty.FormatAsJsom to JsonPretty.FormatAsJson