Material database patch

[Lawproto]

As of https://github.com/icub-tech-iit/cad-mechanics/issues/244, this is the new list of materials.

[Lawproto]

This is the full list, for easier reading:

3d-systems_duraform_prox_pa.mtl
3d-systems_laserform_316l.mtl
aa7075-t6.mtl
aisi_302.mtl
aisi_304.mtl
aisi_316.mtl
aisi_316l.mtl
alm_pa_603-cf.mtl
apworks_alsi10mg.mtl
apworks_scalmalloy.mtl
apworks_ti6al4v.mtl
dupont_delrin_100_nc010.mtl
dupont_rynite_555_nc010a.mtl
eltr_comp_mat.mtl
ge_lexan_9030.mtl
igus_iglidur_j.mtl
igus_iglidur_w300.mtl
iso1043_pe_500.mtl
iso1629_nbr_70-shore-a.mtl
iso1629_sbr_70-shore-a.mtl
iso3506_a2-70.mtl
rohm_plexiglas_8n.mtl
stratasys_rgd720.mtl
stratasys_tangoblackplus_flx980.mtl
stratasys_vero.mtl
tecacomp_peek_lds.mtl
ul94v-0_fr-4.mtl
uns_c38500.mtl
uns_c51000.mtl

cc @icub-tech-iit/silo-mech

[Lawproto]

@fiorisi I ping you to review this.

[fiorisi]

@Lawproto very nice! Did you add also the AISI 630? Here you can find the datasheet: https://github.com/icub-tech-iit/cad-mechanics/wiki/Metal-materials

Concerning the bronze there was the ISO 1338:1977 which status is Withdrawn. So I would stick to the UNS designation.

[fiorisi]

You can also have a look here: https://www.casadelbronzo.com/en/bronze-alloys-mechanical-properties/copper-alloys-designation/

[Lawproto]

Did you add also the AISI 630?

@fiorisi done.

[Lawproto]

@fiorisi I pushed changes in a new commit without using the interactive interface of the PR, my bad! Can you please take a look and check your instructions are implemented, anyway?

[Lawproto]

Ok, we are ready to implement this new material database. Let us just wait the next @icub-tech-iit/silo-mech meeting to explain the situation then merge.