Updates installation instructions
Updates installation instructions

Clone with HTTPS urls as recommended by github:
https://help.github.com/articles/which-remote-url-should-i-use/#cloning-with-https-urls-recommended
Solves error "The authenticity of host 'github.com (192.30.253.113)' can't be established."

Create timeoff-management directory instead of directory "application".
YulioTech/timeoff,YulioTech/timeoff,timeoff-management/application,timeoff-management/application