Release version 0.3.1 (grimme-lab#52)

Bump version to 0.3.0 (grimme-lab#40)

Bump version 0.2.5

Bump version to 0.2.4 (grimme-lab#25)

Release version 0.2.3 (grimme-lab#17)

Allocate lattice for non-periodic structures (grimme-lab#14)

- bump version number to 0.2.2

Allow usage of template input to amend geometry information (grimme-l…

…ab#11)

- transfer lattice, periodicity, bonds and other annotations
- the template structure is read before the input structure from STDIN
- error if template and input structure mismatch in the number of atoms

Add pages documentation regarding supported file formats (grimme-lab#7)