IT update 01-chapter8.markdown

reviewed and corrected "Git e altri sistemi" paragraph
IT update 01-chapter8.markdown

Reviewed and corrected "Git e Subversion" paragraph
IT update 01-chapter8.markdown

Reviewed and corrected "git svn" paragraph
IT update 01-chapter8.markdown

reviewed "Impostazioni"
[it] update 01-chapter8.markdown

corrected typos
[it] complete SVN translation

SVN translation is now completed
Merge pull request #581 from daftano/master

[it] update 01-chapter8.markdown