titles for sub-readme

no-build/README.md

-Continuous Integration for Pd
-=============================
+Continuous Integration for Pd - no-build variant
+================================================
 
 Continous Integraton (CI) will automatically build your software whenever you
 `git push` your code to a (CI-enabled) git-server.

pd-lib-builder/README.md

-Continuous Integration for Pd
-=============================
+Continuous Integration for Pd - pd-lib-builder variant
+======================================================
 
 Continous Integraton (CI) will automatically build your software whenever you
 `git push` your code to a (CI-enabled) git-server.