Beta version 0.2.1

This is a mainly a bug fix release:

• Memory viewer: the column headers are now displayed accordingly to the top left address
• Add the ability to toggle MEM2 when unhooked since attempting to hook while Dolphin runs a GameCube game with MEM2 enabled will instantly cause an unhook.
• Add a precision on the usage of MEM2 in the UI (this is to inform of the possible problem said in the point above)
• Memory Watch: the previews now updates properly when the offsets are changed
• Memory Watch: the entire pointer path is now previewed so you know at which address it ends on each stage of the path, ??? if it's invalid address
• Memory Watch: add the ability to open the memory viewer on a watch's address/pointer address OR each addresses of the pointer path.
• Memory Viewer: make the viewer window non modal so it doesn't prevent you from using the main window and it allows you to minimise it on its own