Version 2.6

This release fixes a few bugs and introduces a major change to the notion of "inline" productions. Previously, adding class=inline to emu-production or emu-grammar would both make its display: inline and render the production in collapsed form with its LHS and RHS on the same line. Now, class=inline will make the production inline only in the HTML sense, and an attribute of collapsed is required when you want the LHS and sole RHS to render on the same line. emu-prodref follows the same convention.