Fix typos all around (thanks codespell!)

ivi-shell/ivi-layout-export.h

@@ -28,7 +28,7 @@
  * surface and layer which groups surfaces. A unique ID whose type is integer is
  * required to create surface and layer. With the unique ID, surface and layer
  * are identified to control them. The API set consists of APIs to control
- * properties of surface and layers about followings,
+ * properties of surface and layers about the following:
  * - visibility.
  * - opacity.
  * - clipping (x,y,width,height).
@@ -554,7 +554,7 @@ struct ivi_layout_interface {
 					   const int32_t number);
 
 	/**
-	 * transision animation for layer
+	 * transition animation for layer
 	 */
 	void (*transition_move_layer_cancel)(struct ivi_layout_layer *layer);
 	int32_t (*layer_set_fade_info)(struct ivi_layout_layer* ivilayer,

ivi-shell/ivi-layout.c

@@ -42,8 +42,8 @@
  *    per each frame. See ivi-layout-transition.c in details. Transition
  *    animation interpolates frames between previous properties of ivi_surface
  *    and new ones.
- *    For example, when a property of ivi_surface is changed from invisibile
- *    to visibile, it behaves like fade-in. When ivi_layout_commitChange is
+ *    For example, when a property of ivi_surface is changed from invisible
+ *    to visible, it behaves like fade-in. When ivi_layout_commitChange is
  *    called during transition animation, it cancels the transition and
  *    re-start transition to new properties from current properties of final
  *    frame just before the cancellation.