Fix conrefs loader with filename starting with /

lib/output/conrefs.js

@@ -5,6 +5,7 @@ var folderOutput = require('./folder');
 var Git = require('../utils/git');
 var fs = require('../utils/fs');
 var pathUtil = require('../utils/path');
+var location = require('../utils/location');
 
 /*
 Mixin for output to resolve git conrefs
@@ -48,10 +49,8 @@ module.exports = function conrefsLoader(Base) {
     ConrefsLoader.prototype.onResolveTemplate = function(from, to) {
         // If origin is in the book, we enforce result file to be in the book
         if (this.book.isInBook(from)) {
-            return this.book.resolve(
-                this.book.relative(path.dirname(from)),
-                to
-            );
+            var href = location.toAbsolute(to, path.dirname(from), '');
+            return this.book.resolve(href);
         }
 
         // If origin is in a git repository, we resolve file in the git repository