Merge pull request #241 from lbl-srg/electrical_mw

Electrical mw
Solved issue with html
Fixed sign when computing S for consistency
Fixed problems in models: old parameters and wrong names
Solved problem with old names and types not updated
Renamed load models and updated models that were using them
Added info section to example packages, moved interfaces packages to the bottom of each package
Revised info section of AC package
Revised documentation of the load model
Updated info sections for loads and impedance
Revised documentation for AC models
updated documentation
Added images for info section of AC lines
Added/revised documentation
Revised examples in package AC.OnePhase.Loads
Revising examples in package AC One phase
Adde info about author
Adde info about examples
Finished to revise AC 1 phase package
Revising AC package (Started 3 phases balanced but still som efixes in single phase)