Replaced the type Types.Assumption with Types.Load and started to revision the AC.ThreePhasesUnbalanced.Conversion package
Fixed problems in html documentation
Added new icon model that conditionally displays the reference angle symbols
Updated the AC one phase transformer models, they now use the icon model to conditionally display the angles
Added init mode for the AC three phases unbalanced load
Updated the icon of y-D and d-Y interfaces
Electrical/AC/ThreePhasesUnbalanced/Conversion/ACACConverter.mo
revised package AC.ThreePhasesUnbalanced.Conversion with examples, docs and unit tests
Updated tests for the validation of the AC three phases unbalanced models
removed old package examples that has been renamed to validation