Unified Scan Node

Merge pull request #6 from tahaHichri/develop

Develop

UE 4.19 support

v4.19-3

Async callback for scan all nearby devices now working

UE 4.21 support

+ Fixed Module import for 4.21

UE 4.20 support

Added 4.20 as a supported Engine version

Added async discovery for UE 4.19

v4.19-2

Upgrade to UE-4.19