Rummy games: full SVG board (stock, discard, melds, fanned hand)
* cg-rummy.el (cg-rummy--board-svg): shared board helper -- stock/discard,
a melds table, and the hand with cursor/marks/lay-off hints and
(hand . INDEX) click regions. (cg-gin--svg, cg-gin--render-text): Gin
dispatch. * cg-rum500.el (cg-tm--svg, cg-tm--render-text): table-meld
dispatch (Rummy and Rummy 500). (cg-render): SVG if graphical, else text.
* test/card-games-tests.el: add cgt-gin-svg-smoke, cgt-tm-svg-smoke.
* NEWS: note the rummy SVG board.