Update readme with bede modifications notice (#3)

README.md

@@ -1,5 +1,11 @@
 # grafana
 
+## This is a bede modified fork of the grafana module.
+
+## Bede modifications are based on v2.6, the last version to support puppet 3
+
+## Use master-bede as the master branch when branching and updating and create a release version using the format v2.6.x-bede
+
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