LinkPreview

 shows article preview on link hover. Inspired by mw:extension:Popups.

Settings
Available through :
 * debug : false - debug mode, verbose output.
 * delay : 100 - hover reaction delay.
 * tlen : 1000 - max text length.
 * csize : 100 - cache size.
 * defimage : - default image source (before article image loaded).
 * noimage : - image-not-found source.
 * scale : {r: '?', t: '/scale-to-width-down/350?'} - replace r to t in the img src (vignette-based scaling). Use scale=false if no scaling nedeed.
 * RegExp.iimages : [] - array of RegExp or plain text. Ignored images, will not be used to build preview.
 * RegExp.ipages : [] - array of RegExp or plain text. Ignored pages, preview will not show up.
 * RegExp.ilinks : [] - array of RegExp or plain text. Ignored links, will have not preview on it.