main interface ok

added grunt-svg2png and set svg 2 png fall back mixin
added bubbles and stars
added nav_pos move on chapter preview

sites/all/themes/gui/jee/assets/img/shadow-bc.svg

@@ -46,7 +46,7 @@
        spreadMethod="pad">
       <stop
          offset="0"
-         style="stop-color:#0066b1;stop-opacity:0.71"
+         style="stop-color:#0066b1;stop-opacity:0.506"
          id="stop5359-9-7" />
       <stop
          offset="1"
@@ -62,8 +62,8 @@
      inkscape:pageopacity="0.0"
      inkscape:pageshadow="2"
      inkscape:zoom="3.959798"
-     inkscape:cx="33.732485"
-     inkscape:cy="127.15041"
+     inkscape:cx="120.98441"
+     inkscape:cy="79.925779"
      inkscape:document-units="px"
      inkscape:current-layer="layer1"
      showgrid="true"