added enlive ref
merged
added reference to C.Grand
few more spelling corrections
added git commands at the end
mv command correction
added git command to tutorial-02
added git command to tutorial-03
added git command to tutorial-04
added git command to tutorial-05
added git command to tutorial-06
added git command to tutorial-07
added git command to tutorial-08
added git command to tutorial-09
added git command to tutorial-10
added git command to tutorial-11
small correction
added git command to tutorial-12
added git command to tutorial-13
added tutorial-15