v2020.4.2

• New high-symmetry k-path algorithm (@munrojm, @kt-latimer)
• New TEM diffraction calculator (@welltemperedpaprika, @thefrankwan, @shyamd)
• New plotly plotting option for Wulff shapes (@richardtran415)
• Improvements to SQS caller (@rwoodsrobinson)
• Various bug fixes and improvements (@mfherbst, @chc273, @jacksund, @espottesmith, @hongyi-zhao, @montoyjh, @dongsenfo, @dynikon) including significant BrunnerNN, EconNN fixes (@utf), see individual pull requests for details.