Reduce function

[takuya-takeuchi]

ios binary requires to provide functions corresponds to all P/invoke functions. But it is too many and occurs to make huge binary. Especially android binary exceeds 2GB.

Therefore I consider to create DlibDotNet-Lite for FaceRecognitionDotNet. And all binaries are embedded to FaceRecognitionDotNet package. It means that DlibDotNet package is unlinked from FaceRecognitionDotNet package. DlibDotNet-Lite packages should not be published. And binary size make be small and decrease consume of memory.