add initial version of Grafana updater

grafana-watcher/Dockerfile

grafana-watcher/Makefile

grafana-watcher/examples/grafana-bundle.yaml

grafana-watcher/examples/updated-configmap0.yaml

grafana-watcher/examples/updated-configmap1.yaml

grafana-watcher/grafana-watcher

grafana-watcher/grafana/dashboard.go

grafana-watcher/grafana/grafana.go

grafana-watcher/main.go

grafana-watcher/updater/updater.go

grafana-watcher/vendor/golang.org/x/sys/LICENSE

grafana-watcher/vendor/golang.org/x/sys/PATENTS

grafana-watcher/vendor/golang.org/x/sys/unix/asm.s

...ana-watcher/vendor/golang.org/x/sys/unix/asm_darwin_386.s

...a-watcher/vendor/golang.org/x/sys/unix/asm_darwin_amd64.s

...ana-watcher/vendor/golang.org/x/sys/unix/asm_darwin_arm.s

...a-watcher/vendor/golang.org/x/sys/unix/asm_darwin_arm64.s

...atcher/vendor/golang.org/x/sys/unix/asm_dragonfly_amd64.s

...na-watcher/vendor/golang.org/x/sys/unix/asm_freebsd_386.s

...-watcher/vendor/golang.org/x/sys/unix/asm_freebsd_amd64.s