Merge pull request #69 from qc2nl/prepare_for_v1.2.3

Prepare for 1.1.3 release

Merge pull request #67 from qc2nl/fix_deprecations

Fix ubuntu test error

Merge pull request #65 from qc2nl/add_default_filename

Add default qchem filename and download notebook links to docs

Merge pull request #59 from qc2nl/dev_ooVQE_class

Extend VQE to include orbital optimization

Merge pull request #54 from qc2nl/dev_online_docs

Dev online docs