Added variant schema in Thesis introduction
Fixed bold in itemize, added some paragraph and

change name introduzione.tex to chapter-1.tex

TODO:
Change language pack from italian to english
Fix and text addictions/optimizations
Added newpage after variants schema
Added nuweb example
.gitignore modified to ignore .exe
Modified gitignore
Added nuweb in chapter-1
Chapter 2 ended. Need to adjust pages layout.
Added Introduction. TO TEST
Merged
Merged test into develop