Add the now-mandatory @since tags to example EO files

tutorial/c/eo-inherit/src/example_rectangle.eo

@@ -1,5 +1,8 @@
 class Example.Rectangle extends Efl.Object {
-   [[A rectangle shape object]]
+   [[A rectangle shape object
+
+     @since 1.00
+   ]]
    methods {
       @property width {
          [[The width of this rectangle]]

tutorial/c/eo-inherit/src/example_square.eo

@@ -1,5 +1,8 @@
 class Example.Square extends Example.Rectangle {
-   [[A square shape object]]
+   [[A square shape object
+   
+     @since 1.00
+   ]]
    implements {
       Example.Rectangle.width {set;}
       Example.Rectangle.height {set;}

tutorial/c/eo-multiinherit/src/example_circle.eo

@@ -1,5 +1,8 @@
 class Example.Circle extends Efl.Object implements Example.Shape {
-   [[A circle shape object]]
+   [[A circle shape object
+   
+     @since 1.00
+   ]]
    methods {
       @property radius {
          [[The radius of this circle]]

tutorial/c/eo-multiinherit/src/example_colored.eo

@@ -1,5 +1,8 @@
 mixin Example.Colored {
-   [[A mixin for providing APIs for managing colour properties]]
+   [[A mixin for providing APIs for managing colour properties
+   
+     @since 1.00
+   ]]
    methods {
       @property color {
          [[The colour to associate with the class we are coloring.

tutorial/c/eo-multiinherit/src/example_rectangle.eo

@@ -1,5 +1,8 @@
 class Example.Rectangle extends Efl.Object implements Example.Shape, Example.Colored {
-   [[A rectangle shape object]]
+   [[A rectangle shape object
+   
+     @since 1.00
+   ]]
    methods {
       @property width {
          [[The width of this rectangle]]

tutorial/c/eo-multiinherit/src/example_shape.eo

@@ -1,5 +1,8 @@
 interface Example.Shape {
-   [[A generic shape object]]
+   [[A generic shape object
+   
+     @since 1.00
+   ]]
    methods {
       area {
          [[Calculate the area of the shape.]]

tutorial/c/eo-multiinherit/src/example_square.eo

@@ -1,5 +1,8 @@
 class Example.Square extends Example.Rectangle {
-   [[A square shape object]]
+   [[A square shape object
+   
+     @since 1.00
+   ]]
    implements {
       Example.Rectangle.width {set;}
       Example.Rectangle.height {set;}