please add .tar.gz to manual installation in read.me

[tinastefaniewenzel]

Hi,

I helped someone with manually installing the package.

The downloaded file was a zip so I had to convert this into a .tar.gz first and the install.package from source command is not quite right.

Could you add a tar.gz file to the download link and update the installation command to
install.packages("/Users/me/Downloads/redshift-r-master.tar.gz", repos=NULL, type="source")?

To convert zip to tar file:
tar -cvzf redshiftmaster.tar.gz redshiftmaster

Thanks,
Tina