Add filters to add/remove classes on templates
To change templates we have to copy the templates from the plugin to our theme. Most of the time I just need to add or remove a few classes - for example on the cart.php the classes for the table to make them bootstrap ready:
<table class="shoptable shoptable_responsive cart woocommerce-cart-form__contents" cellspacing="0">
So just for 2 CSS Classes I don`t want to copy the whole template.