Add simple filter tutorials (#226)

Signed-off-by: EsipovPA <[email protected]>
(cherry picked from commit c31a7a9)

# Conflicts:
#	src/message_filters/__init__.py

Author: EsipovPA

doc/Tutorials/Approximate-Synchronizer-Python.rst

@@ -117,8 +117,8 @@ Navigate to the root of your package's directory, where ``package.xml`` is locat
 
 .. code-block:: xml
 
-   <exec_depend>rclpy</exec_depend>
    <exec_depend>message_filters</exec_depend>
+   <exec_depend>rclpy</exec_depend>
    <exec_depend>sensor_msgs</exec_depend>
 
 2.2 Add an entry point

doc/Tutorials/Cache-Cpp.rst

@@ -277,8 +277,8 @@ Navigate to your package root and add the following dependencies in ``package.xm
 
 .. code-block:: xml
 
-    <depend>rclcpp</depend>
     <depend>message_filters</depend>
+    <depend>rclcpp</depend>
     <depend>std_msgs</depend>
 
 3. Add the Node to a CMakeLists.txt

doc/Tutorials/Cache-Python.rst

@@ -224,8 +224,8 @@ Navigate to your package root and add the following dependencies in ``package.xm
 
 .. code-block:: xml
 
-    <depend>rclpy</depend>
     <depend>message_filters</depend>
+    <depend>rclpy</depend>
     <depend>std_msgs</depend>
 
 3. Add Entry Point in setup.py

doc/Tutorials/Chain-Cpp.rst

@@ -429,8 +429,8 @@ Navigate to your package root and add the following dependencies in ``package.xm
 
 .. code-block:: xml
 
-    <depend>rclcpp</depend>
     <depend>message_filters</depend>
+    <depend>rclcpp</depend>
     <depend>std_msgs</depend>
 
 3. Add the Node to a CMakeLists.txt

doc/Tutorials/Chain-Python.rst

@@ -283,8 +283,8 @@ Navigate to your package root and add the following dependencies in ``package.xm
 
 .. code-block:: xml
 
-    <depend>rclpy</depend>
     <depend>message_filters</depend>
+    <depend>rclpy</depend>
     <depend>std_msgs</depend>
 
 3. Add Entry Point in setup.py