Merged Annex60 library.
Merged branch issue73_evaluate from Annex60 library.
Changed initialization to avoid an overdetermined system of equation.
Updated reference results.
Merged Annex60 library.
Removed undesirable annotation Evaluate=true.
Reverted heat transfer model to use the one from the Buildings library.
Removed empty line.
Merge pull request #232 from lbl-srg/Annex60Sync

Merged Annex60 library and removed undesirable annotations with Evaluate=true to close #231
Replaced modelled with modeled.
Added new types of transformers
improved initialization of line model
Added new parameter to load model, this is used during initialization by the homotopy operator
Added parameter angle for initialization purposes
Updated ac 3ph transformers with parameter angle for initialization purposes
Added new IEEE validation examples to the AC3 phases unbalanced package
Changed script to run all tests.
Changed some models to avoid unspecified initial equations.
Updated release notes.
Changed capitalization.