Add tickx2, y2, xy2 demos

Author: linev

demo/examples.json

@@ -32,6 +32,9 @@
      { "opt": "tickx", "title": "draw X ticks also on opposite frame side" },
      { "opt": "ticky", "title": "draw Y ticks also on opposite frame side" },
      { "opt": "tickxy", "title": "draw X and Y ticks also on opposite frame sides" },
+     { "opt": "tickx2", "title": "draw X ticks with labesl also on opposite frame side" },
+     { "opt": "ticky2", "title": "draw Y ticks with labels also on opposite frame side" },
+     { "opt": "tickxy2", "title": "draw X and Y ticks with labels also on opposite frame sides" },
      { "name": "xticks", "opt": "xticks:[-3.75,-1.2,1.2,3.75]", "title": "configure custom x ticks positions" },
      { "opt": "allbins", "title": "draw underflow/overflow bins" },
      { "name": "axis", "opt": "axis;nostat;maximum:1000", "title": "draw only axes, configure maximum value, disable stats" },