creation of index.html file
Changing title of section2
Changing body of section2: Rozproszony system kontroli wersji
Addition of encoding declaration to page header
change of section1 title
Changing body of section1: Systemy Kontroli Wersji
Merge branch 'master' into cecha2
Changing footer in section1: Systemy kontroli wersji
Changing footer in section2: Rozproszony system kontroli wersji
Merge branch 'cecha2'
Change of <nav> content
Change of <footer> content