Improve Spirit parser

[PhilippRue]

So far the spirit parser only takes some basics. This should be improved. See also discussion in issue #4:

Other useful outputs might be:
For LLG (Dynamics) (meaning LLG with any solver that is not VP/LBFGS and direct_minimization=false)

Snapshots of the spin configuration at different time intervals

• Energies at different time intervals

For LLG (Minimization) (So we probably expect some metastable configurations)

• The profile/radius (thinking of Skyrmions)

• Topological charge

For GNEB

• The saddle point configuration/energies

• Energy barrier

For HTST

• All of the quantities in htst_info

• Eigenvalues/Eigenvectors (if non sparse calculation)

MC

• Critical temperatures (requires post processing, so maybe a bit out of scope)
• Ground state spin configuration (simulated annealing + final minimization with LLG) (How to control convergence?)