PackageReleaseProcedure.md

-1. Checkout master
+1. Checkout source branch, usually just master.
 1. Pull latest version from cds
 1. Update src/include/rcgversion.h if necessary and commit.  If this is a dev release, set RCG_VERSION_REL to 0.  If a full release, set to 1.
 1. Update NEWS file if needed.