Image reverse search

Adds an option to the context menu to search with an image on Google, Bing, Yandex, TinEye, SauceNAO, IQDB or custom search engines with your own URL. If you choose more than one search engine, they will all be shown in a handy submenu! If more than one search engine is selected, a new entry "Open All" will also be shown. You can even choose the tab behaviour that suits your needs!