remake the box-size grid, nuke fluid grid docs, fix up examples, clean up form styles

less/forms.less

@@ -297,9 +297,12 @@ textarea[class*="span"],
 // GRID SIZING FOR INPUTS
 // ----------------------
 
-// Grid sizes
-#grid > .input(@gridColumnWidth, @gridGutterWidth);
-
+input[class*="span"],
+select[class*="span"],
+textarea[class*="span"],
+.uneditable-input[class*="span"] {
+  height: 30px;
+}
 // Control row for multiple inputs per line
 .controls-row {
   .clearfix(); // Clear the float from controls