Add beaker clusterX notebook and data

beaker-notebooks/clusterX.bkr

example-data/sige1/1/energy

example-data/sige1/1/str.out

example-data/sige1/10/energy

example-data/sige1/10/str.out

example-data/sige1/11/energy

example-data/sige1/11/str.out

example-data/sige1/12/energy

example-data/sige1/12/str.out

example-data/sige1/13/energy

example-data/sige1/13/str.out

example-data/sige1/14/energy

example-data/sige1/14/str.out

example-data/sige1/15/energy

example-data/sige1/15/str.out

example-data/sige1/16/energy

example-data/sige1/16/str.out

example-data/sige1/17/energy

example-data/sige1/17/str.out

example-data/sige1/18/energy