Update readme.md to acknowledge WinRT and UWP support. Remove reference to CE projects, as CE doesn't support async/await/tasks, so can't support the public interfaces in this library.
Update readme.md to acknowledge WinRT and UWP support. Remove reference to CE projects, as CE doesn't support async/await/tasks, so can't support the public interfaces in this library.

stickybun/RSSDP,Yortw/RSSDP,noex/RSSDP,Yortw/RSSDP