FEATURE: work on qutebrowser

[amtoine]

This PR proposes some work around the qutebrowser application.

I let this PR a draft for the time being and will request a review from you @atxr as soon as

• 22

• 23

are closed :yum:

the changes

• move the downloads to ~/downloads/
• add and fix quickmarks and bookmarks
• fix the comments in the config.py file

[amtoine]

60854d2: i've added a bunch of new quickmarks that were on my amtoine personal branch :ok_hand: