Update Readme.md
Update Readme.md

Change build shield to same style as other shields and point to master branch.
Moya/Moya,justinmakaila/Moya,justinmakaila/Moya,ashfurrow/Moya,calt/Moya,Moya/Moya,ashfurrow/Moya,calt/Moya,Moya/Moya,calt/Moya,justinmakaila/Moya