Add tools for many bundle sites.

• mark owned Steam games
• add button to mark owned Steam games

Support: bunchkeys.com bundlekings.com cubicbundle.com dailyindiegame.com fanatical.com gamebundle.com gogobundle.com groupees.com hrkgame.com humblebundle.com indiegala.com orlygift.com otakumaker.com otakubundle.com reddit.com sgtools.info steamcommunity.com steamcompanion.com steamdb.info steamground.com steamkeys.ovh store.steampowered.com superduperbundle.com whosgamingnow.net

Installation Note: Please install a user script manager first.