feature: reinstate the Berksfile with the 2.x syntax (site instead of source)

- source is not compatible with bersk 2, while site is (even with the warning)
build: ignore .awl files

- selfish but will prevent me to push unwanted files
feature: provide start scripts for hbase/tsdb/tcollector/all

- not yet the full init.d/systemd files, but usefull when the box is used outside of vagrant