fix(build): correct jshint errors

Gruntfile.js

@@ -1,5 +1,7 @@
 module.exports = function(grunt) {
 
+  /* global Buffer */
+  
   require('load-grunt-tasks')(grunt);
 
   // project configuration

lib/Viewer.js

@@ -52,7 +52,8 @@ var SVG_HEADER =
 '<?xml version="1.0" encoding="utf-8"?>\n' +
 '<!-- created with bpmn-js / http://bpmn.io -->\n' +
 '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1 Basic//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-basic.dtd">\n' +
-'<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" baseProfile="basic">\n';
+'<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" ' +
+     'version="1.1" baseProfile="basic">\n';
 
 Viewer.prototype.saveSVG = function(options, done) {
   if (!done) {

lib/import/Importer.js

@@ -17,7 +17,12 @@ function importBpmnDiagram(diagram, definitions, done) {
       if (di.$type === 'bpmndi:BPMNShape') {
         var bounds = di.bounds;
 
-        shape = { id: element.id, type: element.$type, x: bounds.x, y: bounds.y, width: bounds.width, height: bounds.height, parent: parent };
+        shape = {
+          id: element.id, type: element.$type,
+          x: bounds.x, y: bounds.y,
+          width: bounds.width, height: bounds.height,
+          parent: parent
+        };
 
         canvas.addShape(shape);
       } else {