Fix dll import for CoCreateInstanceApp if build type is W8CORE (otherwise Imaging factory creation fails on WinRT, Windows Phone 8.1)
[SharpDX] Fixed DLL name for CoCreateInstanceApp for WinRT and WP8 platforms.
FormatMessageW to use localization library path in WinRT build

Added const for library path on file operations

Set library path so Universal app pass certification test
Add defines for GetProcAddress and CloseHandle
Merge branch 'wp81' of https://github.com/mrvux/SharpDX into pr350
[SharpDX] Add helper methods on DataPointer to CopyFrom, CopyTo and convert to DataStream/DataBuffer