Fix jade lint errors and check by default.

.pug-lintrc

@@ -1,4 +1,6 @@
 {
   "preset": "clock",
-  "validateIndentation": null
+  "validateIndentation": null,
+  "disallowIdLiterals": null,
+  "disallowAttributeInterpolation": null
 }

lib/plugins/html/templates/layout.jade

@@ -1,8 +1,8 @@
 doctype html
-html(lang="en")
+html(lang='en')
     head
         title= pageTitle
-        link(rel="stylesheet", href=cssLink)
+        link(rel='stylesheet', href=cssLink)
         block inlineStyles
 
     body

lib/plugins/html/templates/pages.jade

@@ -8,4 +8,4 @@ block content
         each pageInfo, url in pages
             tr
                 td
-                    a(href="#{pageInfo.path}/index.html")= url
+                    a(href='#{pageInfo.path}/index.html')= url

lib/plugins/html/templates/url/index.jade

@@ -37,4 +37,3 @@ block content
 
       if pageInfo.data.webpagetest
           include ./webpagetest/index.jade
-

package.json

@@ -32,7 +32,7 @@
     "url": "https://github.com/soulgalore/sitespeed.io/issues"
   },
   "scripts": {
-    "lint": "npm run eslint",
+    "lint": "npm run eslint && npm run pug-lint",
     "eslint": "eslint .",
     "eclint": "eclint check * lib/**/* bin/**/* tools/**/* !*.iml",
     "eclint:fix": "eclint fix * lib/**/* bin/**/* tools/**/* !*.iml",