Linux wallet v1.0.1.2-beta for Nexbit (NBC)

1. Short block spacing time
2. Increase POS reward
3. Using patches from using latest bitcoin-core
4. QR-Code integrate [Next version]
5. Integrate a validation system for preventing "FAKE PoS"
6. Improvements on block-re target algorithm
7. Multiple seed node hard-coded on wallet (no need to add any node then)
8. Improvements on NBC integration in various platforms
9. Prepare for NIP#2