convert to DOM for debugging into Node scripts

Fix nwjs/nw.js#2214

passing nwsnapshot path to v8

Fix nwjs/nw.js#2141

passing nwsnapshot path to v8

Fix nwjs/nw.js#2141

passing nwsnapshot path to v8

Fix nwjs/nw.js#2141

Fix: new-win-policy is fired on each navigation

Merge pull request nwjs#3 from SgtConti/nw

Update ImageBuffer.cpp

advance to LayoutClean state exactly where it starts

or we'll have state assertion in nwfaketop tests

use 'new-win-policy' for middle and ctrl click

Fix nwjs/nw.js#1547

fix crash in alert()