Capitalize namespacing structs

This helps to avoid name clashes when breaking up modules into packages.

src/hulk/fb.d

@@ -11,7 +11,7 @@ import hulk.kfont;
  *
  * TODO: Handle other pixel formats. Currently only BGRx is supported.
  */
-struct fb
+struct Fb
 {
     /** Device frame buffer base address. */
     private __gshared static uint * m_device_buffer;
@@ -141,8 +141,8 @@ struct fb
      */
     static void character(int x, int y, char ch, uint color)
     {
-        const(CharInfo) * ci = &kfont.chars[ch];
-        blend_alpha_bitmap(x + ci.left, y + kfont.baseline_offset + ci.top - ci.height, ci.bitmap, ci.width, ci.height, color);
+        const(CharInfo) * ci = &Kfont.chars[ch];
+        blend_alpha_bitmap(x + ci.left, y + Kfont.baseline_offset + ci.top - ci.height, ci.bitmap, ci.width, ci.height, color);
     }
 
     /**