Migrate code from mupen64plus-rpi into separate project

	new file:   src/main.c
	new file:   src/main.h
	new file:   src/osal_dynamiclib.h
	new file:   src/osal_dynamiclib_unix.c
	new file:   src/osal_dynamiclib_win32.c
	new file:   unix/Makefile
Removal of compiled objects

	renamed:    msvc11/mupen64plus-audio-sdl.vcxproj -> msvc11/mupen64plus-audio-omx.vcxproj
	renamed:    msvc8/mupen64plus-audio-sdl.vcproj -> msvc8/mupen64plus-audio-omx.vcproj
	deleted:    unix/_obj/main.d
	deleted:    unix/_obj/main.o
	deleted:    unix/_obj/osal_dynamiclib_unix.d
	deleted:    unix/_obj/osal_dynamiclib_unix.o