html validation and linting
use lineman-blog instead of grunt-markdown-blog
now we have to explicitly disable the archive and rss feed. yay deep merge
remove all properties that are already inherited from lineman-blog
DRY config
Merge branch 'html-validation'

* html-validation:
  html validation and linting

Conflicts:
	config/application.coffee
	package.json
need to merge npm tasks array :(