* Added the location for the issues
* Added the location for MR's
* I wrote the URL in full because
    * We have a mirror on github, adding the full URL makes it more explicit that MR's need to be done on another repo
    * Advertising GAFAM free platforms ;)
* I also use this MR to start using a develop branch and added this to the README
* I also removed how to install from the web interface because ynh has removed the possibility to add custom lists from the webinterface

HgO authored Nov 23, 2019 and Ilja committed Nov 23, 2019

Adding backup and restore
Extra changes in the install script to use $app instead of 'neutrinet'

- update the `upgrade` script
- add instruction about how to upgrade in the README
- update the index.html file so it doesn't contain information that
might change often (link to our website instead)