Update README.md
Created by: spuder
Edits README.md to clarify that git 1.7.10 is required 6.0 branch
Partially resolves Issue #5090 (closed)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: spuder
Edits README.md to clarify that git 1.7.10 is required 6.0 branch
Partially resolves Issue #5090 (closed)