Added Samsung models for Unlock, Repair IMEI and Software Update:
- Galaxy 5 (Corby) GT-I5500B
- Galaxy 5 (Corby) GT-I5503
- Galaxy 551 (Callisto) GT-I5510L
- Galaxy Q SGH-T589W
- Galaxy Discover SGH-S730M
- Galaxy Appeal (AT&T) SGH-I827/ SGH-I827D
- Galaxy Tab (AT&T) SGH-I987
Various bugfixes