[ps2,terminal_usb] Quick fix for build problem

usb_usb: Add SpaceFn and hasu keymap

Merge branch 'usb_usb_hub'

Update README

Change debug print config

Add USB Hub support

Add submodule legitimate USB_Host_Shield_2.0

Remove submodule USB_Host_Shield_2.0

Fix print init; print_set_sendchar in main

Change USB PID

usb_usb: Update for new core layout

hhkb: Change keymap and bootmagic salt key

Merge branch 'u2_fix'

Fix endpoint buffer setting for AT90USB82/162.

Merge branch 'merge_rn42'

Change key_t to keypos_t

Fix debug.h

Merge branch 'rn42' into merge_rn42

Conflicts:
	.gitignore
	common.mk
	common/debug_config.h
	common/print.h

Update doc

Remove MCU dependent code from common/keyboard.c