Update base.jade.

* add meta charset
* add image dimensions
* fix validation errors
Update html5 boilerplate to the latest git.
Update jquery to v2.1.0.
Update modernizr.js to v2.7.1.
Update underscore.js to v1.5.2.
Remove the unused qtip.css.
Remove the favicon folder.
Remove zero byte npmignore file.
Specify favicon in the html too.