Fix style
Fix spelling mistake
Initial draft for the abstract.
About 200 words are needed, now I'm at 130. Have to think hard about how to
make it longer
Fix abstract
Fix chapters
Move abstract outside tesi.tex
Remove from abstract.tex all commands found only in the 'memoir' document class.

Now the abstract can be used with different document classes without error.
tesi.tex is responsible for its vertical placement and styling.
As an added bonus tex files readability is improved.
Add blueprint for the thesis
Add some images representing circuit behaviour