VVDI2 Software Update to V6.6.6

---

Xhorse VVDI2 key programmer software update to V6.6.6.
V6.6.6 VVDI2:
2019-09-19 Require firmware V6.6.5
VAG V6.6.6
1. Bugfix for read touareg ECU PIN code(ME7)
2. Improvement for autodetect VAG immobilizer system
3. Bugfix
BMW V6.6.6
1. Improvement for CAS4/CAS4+ key learning
2. Bugfix
Transponder Programmer V6.6.6
1. Special transponder: Bugfix for Buick excelle XT 4D 80Bit
2. Special transponder: Bugfix for Buick excelle 4D 80Bit
3. Immobilizer data tool: Asia->Nissan->Cima 93C46 4D
4. Bugfix