Install `grunt-shell`.
Build documentation through Grunt.
Open HTML documentation via grunt.
Merge branch 'master' into grunt-sphinx
Semantic changes in Grunt Sphinx integration.
Merge branch 'master' into grunt-sphinx

Conflicts:
	Gruntfile.js
New, "Contributing Documentation" doc.
Merge pull request #600 from wymeditor/grunt-sphinx

Yey for integration of Sphinx into Grunt.