Update file tree for 'ready to compile' (now just run builder.py to build and install library)
Fix SDL error when GUI interact after call quit()
Fix minor bug in debug mode
Fix quit method not work
Change name syntax for environ choses 
Added all Omega methods
Added all Upsilon methods
> (new methods are added with chose of os)
Fix some display bug
Fix demo script don't start
Fix PC mode enable with shortcut CTRL+M
implement of ion module in this library

TODO:
random time error loop when window close in python shell mode on Windows 10
parameter ``font`` of draw_string() for Upsilon not work for moment
screen refresh stop when user interact with GUI
open a window to inform the user that the script is finished
calculate speed for new methods