This is a "ready to go" theme with best practise code from all TYPO3 websites I have done and coached.
For a quick start, do the following
in your shell:
$ curl https://raw.github.com/georgringer/modernpackage/master/start.sh > start.sh && start.sh ./typo3conf/ext/theme_anyname
This will download the file https://github.com/georgringer/modernpackage/blob/master/start.sh and create a new extension based on the name "theme_anyname".
Install the extension "theme_anyname".