Fixed issue where GetDeltaAsync parameter incorrectly was named path but was sent as cursor to RequestHelper
Added parameters path_prefix, locale and include_media_info to GetDelta/GetDeltaAsync
Prepended path_prefix with / if there was no leading forward slash in synchronous call
Added overload for GetDelta and GetDeltaAsync to not break old code
Merge pull request #134 from runeborg/master

Added missing parameters to GetDelta for path_prefix, locale and include_media_info