Add event attribute source

[victorteokw]

No description provided.

[osv]

I think no need event attributes, because you can get them all from tern.js (tern-auto-complete)

just add "browser" to your ".tern-project" located in your html project dir:

{
  "libs": [
    "browser",
  ],
    "plugins": {
    }
}

and in your web-mode setup

(defun my-web-mode-hook ()
  "Hooks for Web mode."
  (setq web-mode-ac-sources-alist
        '(("css" . (
                    ac-source-css-property
                  ))
          ("html" . (
                     ac-source-tern-completion
                     ac-source-html-tag
                     ac-source-html-attribute
             ac-source-html-attribute-value
                     ))
          ("jsx" . (
                     ac-source-tern-completion))
          ("javascript" . (
                     ac-source-tern-completion))))
  (setq web-mode-enable-auto-quoting nil)
  (auto-complete-mode t)
  (tern-mode t))

Maybe update readme with few words about tern?

[victorteokw]

"event attribute source" I mean "onload", "onbeforeprint", "onclick". Now our html attribute only covers normal attributes.

[victorteokw]

Most users who using this package, are web developers and write javascript, too.
Add some words about tern is better.