v0.5.1

AtomsBase v0.5.1

Diff since v0.5.0

Merged pull requests:

• AtomsBaseTesting cell vectors check for infinite systems (#132) (@jgreener64)
• Bugfixes related to chemical_formula (#133) (@mfherbst)
• Fix link in tutorial.md (#135) (@joachimbrand)
• Fix bug in element_symbol call (#136) (@tjjarvinen)

Closed issues:

• Revisit ChemicalSpecies (#115)
• Return type of atomic_symbol changed (#134)