Emulate GameCube memory card speeds
Redo timing in DMAWrite/DMARead
Revised channel access from EXI_DeviceMemoryCard
DolphinWX: Move some public variables to be private in CodeView

It's not used outside of the class, and it also shouldn't be modified
outside of it either (considering it holds all the blr instructions inserted by the user).
Merge pull request #653 from lioncash/internal-state

DolphinWX: Move some public variables to be private in CodeView
Merge pull request #581 from TotalNerd/memcard-emu

Emulate GameCube memory card speeds