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-dph.svg

@@ -45,7 +45,7 @@
        fy="-2661.446">
       <stop
          offset="0"
-         style="stop-color:#cecd00;stop-opacity:0.698"
+         style="stop-color:#cecd00;stop-opacity:0.545"
          id="stop5359-9-7" />
       <stop
          offset="1"
@@ -61,8 +61,8 @@
      inkscape:pageopacity="0.0"
      inkscape:pageshadow="2"
      inkscape:zoom="3.959798"
-     inkscape:cx="23.883498"
-     inkscape:cy="84.471467"
+     inkscape:cx="74.012318"
+     inkscape:cy="82.956238"
      inkscape:document-units="px"
      inkscape:current-layer="layer1"
      showgrid="true"