qutebrowser: Add hypothesis annotation function

Can be activated through the command alias ':hypothesis' or just the
shortcut `<localleader>+a`, so `,a`.

qutebrowser/config/alias.py

@@ -40,3 +40,6 @@ c.aliases["cookie-block"] = "spawn --userscript qute-cookie-block"
 
 # open last downloads in dmenu-like
 c.aliases["recent-downloads"] = "spawn --userscript recently-downloaded"
+
+# annotate with hypothesis
+c.aliases["hypothesis"] = "jseval (function(){window.hypothesisConfig=function(){return{showHighlights:true,appType:'bookmarklet'};};var d=document,s=d.createElement('script');s.setAttribute('src','https://hypothes.is/embed.js');d.body.appendChild(s)})();'hypothesis enabled'"

qutebrowser/config/maps.py

@@ -86,6 +86,7 @@ config.bind('"p', "send-to-scihub", mode="normal")  # view current page doi on s
 config.bind(";p", "hint links run send-to-scihub")  # view linked doi on scihub
 
 config.bind(lleader + "r", "readable", mode="normal")
+config.bind(lleader + "a", "hypothesis", mode="normal")
 
 # set stylesheets for the browser to use
 config.bind(