Renamed nsCSSScanner to CssScanner, nsCSSToken to CssToken, nsCSSTokenType to CssTokenType, nsCSSKeyword to CssKeyword, nsCSSScannerTests to CssScannerTests
Lowered framework requirement to .NET 3.5
Added test for SO question 18262390; fixed GetUris method (NRE if errors in CSS); added CssDeclaration.AllData property