Merge pull request #364 from fhurta/master

Fixed to build as SL5 project
remove un-necessary comment
Added InvariantCulture to ParseStringDelegate for numerics. We had an issue with xamarin/monodroid where negative numbers in parsed json-strings was returned as 0. This only happened on devices where language was set to something else than English. This commit fixes that problem.
Merge pull request #365 from Discobanan/master

Added InvariantCulture to ParseStringDelegate for numerics.
Add AppendUrlPathsRaw - like AppendUrlPaths but doesn't encode its parts