Normalize package.json.
Whitespace cleanup.

Remove trailing spaces and use 4 spaces consistently for indentation.
Gruntfile.js: sort jshint rules by name.
Update JSHint rules.
Enable JSHint indent rule.
Enable JSHint's quotmark rule.
Enable JSHint's eqeqeq rule.
Move global config to jshint's configuration.
Remove unused variables.
Bump grunt-contrib-jshint to 0.7.2
Move JSHint config to .jshintrc and .jshintignore
Remove CSSLint globals directives

Now covered by the .jshintrc file
Add alphabetical order rule
Added a new rule to force relative background image urls.
Fixed some errors is test suite.
Add new rule to detect if number of @import has exceeded the limit in IE6-9
Updated patch per feedback from @pomeh
Update dependencies.
Merge remote-tracking branch 'remotes/nschonni/jshint-cleanup'

Conflicts:
	Gruntfile.js
	src/rules/box-model.js
	src/rules/box-sizing.js
	src/rules/compatible-vendor-prefixes.js
	src/rules/duplicate-properties.js
	src/rules/fallback-colors.js
	src/rules/outline-none.js
	src/rules/overqualified-elements.js
	src/rules/shorthand.js
	src/rules/unique-headings.js
	src/rules/unqualified-attributes.js
	src/rules/vendor-prefix.js
Merge remote-tracking branch 'remotes/hsablonniere/add-order-alphabetical'