function parseDB(data, optimized) {
						if (typeof data == 'string') {
							data = JSON.parse(data);
						}

						if (!optimized) {
							data = optimize(data);
						}

						vendorsDB = data.vendors;
						cssDB = data.css;
						erasDB = data.era;
					}
Parses raw Can I Use database for better lookups
@param  {String} data Raw database
@param  {Boolean} optimized Pass `true` if given `data` is already optimized
@return {Object}