put manual / install details in readme directly

[grandjeanlab]

Is your feature request related to a problem? Please describe.
the manual is hosted in a pdf, including details how to install the software.
by default, github will open the pdf internally without the option to copy text.
it makes copying the install commands bothersome.

Describe the solution you'd like
it would be more straight forward to have the install commands on the readme, so we can directly copy and paste it into our terminals.