Add tutorials for gCAP3D

[core-man]

• Introduction: https://blog.seisman.info/gcap-install/
• Install (gCAP3D: Add gCAP3D installation #219)
• Build Green Functions: Need some depedent software, e.g., fk
• An example
• Differences between cap, gcap, gcap3d, cap-tele, gcap-tele, gcap-sf et al.
  • SeisMan's blog
  • oh my cap

references

gCAP:

• https://blog.seisman.info/gcap-install/
• https://seismology.xyz/oh-my-cap/

gCAP3D:

• https://blog.seisman.info/gcap-install/
• https://github.com/wangliang1989/capjoint

Also see seismo-learn/maintenance#12

[core-man]

@yanyanxu is willing to help with this tutorial.

[wangliang1989]

我想把 https://seismology.xyz/oh-my-cap 的文档部分搬到这里来，你们愿意吗？ohmycap是gcap，不是gcap3d

[seisman]

我想把 seismology.xyz/oh-my-cap 的文档部分搬到这里来，你们愿意吗？ohmycap是gcap，不是gcap3d

I don't think I like how oh-my-cap works. It's a NO from me.

[wangliang1989]

I don't think I like how oh-my-cap works.

这句话什么意思？我说的是文档搬过来