pre requisite for installation

[francesco-sudo]

Hi,
Another requisite for install ultrastar singer is install git e put in the PATH. You should mention this on the installation guide.
without git installad you get this message:

ERROR: Cannot find command 'git' - do you have 'git' installed and in your PATH?

and the installation fail.
Anyway. Great Job. Amazing work

[rakuri255]

Yes true. I try to optimize the readme :)