Check if provided snippet contains only one CSS property and value.
@param {String} snippet
@returns {Boolean}
function isSingleProperty(snippet) {
		var utils = require('utils');
		snippet = utils.trim(snippet);
		
		// check if it doesn't contain a comment and a newline
		if (~snippet.indexOf('/*') || /[\n\r]/.test(snippet)) {
			return false;
		}
		
		// check if it's a valid snippet definition
		if (!/^[a-z0-9\-]+\s*\:/i.test(snippet)) {
			return false;
		}
		
		snippet = require('tabStops').processText(snippet, {
			replaceCarets: true,
			tabstop: function() {
				return 'value';
			}
		});
		
		return snippet.split(':').length == 2;
	}