Add Twenty Fourteen compatibility to WooCommerce < 2.1

functions.php

// Remove stock wrappers
remove_action( 'woocommerce_before_main_content', 'woocommerce_output_content_wrapper', 10 );
remove_action( 'woocommerce_after_main_content', 'woocommerce_output_content_wrapper_end', 10 );

// Add 2014 compatible wrappers
add_action( 'woocommerce_before_main_content', 'wc_twentyfourteen_wrapper', 10 );
add_action( 'woocommerce_after_main_content', 'wc_twentyfourteen_wrapper_close', 10 );

function wc_twentyfourteen_wrapper() {
  echo '<div id="primary" class="content-area"><div id="content" role="main" class="site-content twentyfourteen"><div class="tfwc">';
}

function wc_twentyfourteen_wrapper_close() {
  echo '</div></div></div>';
  get_sidebar( 'content' );
}

// Add 2014 compatibility css
add_action( 'wp_footer', 'wc_twentyfourteen_css' );

function wc_twentyfourteen_css() {
	if ( is_shop() || is_product_category() || is_product_taxonomy() || is_product_tag() || is_product() ) {
	?>
	<style type="text/css">
		.twentyfourteen .tfwc {
			padding: 12px 10px 0;
		    max-width: 474px;
		    margin: 0 auto;
		}

		.twentyfourteen .tfwc .entry-summary {
			padding: 0 !important;
		    margin: 0 0 1.618em !important;
		}

		.full-width .twentyfourteen .tfwc {
			margin-right: auto;
		}

		@media screen and (min-width: 673px) {
	        .twentyfourteen .tfwc {
	            padding-right: 30px;
	            padding-left: 30px;
	        }
		}

		@media screen and (min-width: 1040px) {
	        .twentyfourteen .tfwc {
                padding-right: 15px;
                padding-left: 15px;
	        }
		}

		@media screen and (min-width: 1110px) {
	        .twentyfourteen .tfwc {
                padding-right: 30px;
                padding-left: 30px;
	        }
		}

		@media screen and (min-width: 1218px) {
	        .twentyfourteen .tfwc {
                margin-right: 54px;
	        }
		}
	</style>
	<?php
	}
}