remove redundant Makefile.def in src directory
deleted unused variables
rename Makefile.new to default Makefile
add empty lib directory
remove -f Makefile.new
minor changes
don't support win32 anymore, only linux is supported
move tests from src to top directory
delete extern-libs
move D3D and GL head files to inc direcotry
move src/tools to tool
move confs from src to top
rename gpu to block because it implements signal and box