Add example for learning capabilities with torchpme #507

Job	Run time
setup	5s
generate-example (lode-linear)	3m 22s
generate-example (roy-gch)	3m 34s
generate-example (dos-align)	6m 26s
generate-example (lpr)	3m 32s
generate-example (batch-cp2k)	1m 47s
generate-example (gaas-map)	4m 32s
generate-example (torchpme)	15m 18s
generate-example (pi-metad)	4m 9s
generate-example (sample-selection)	3m 21s
generate-example (thermostats)	3m 37s
generate-example (heat-capacity)	2m 30s
generate-example (periodic-hamiltonian)	7m 31s
generate-example (pi-mts-rpc)	6m 49s
generate-example (path-integrals)	1m 48s
build-and-publish	41s
	1h 9m 2s

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