Added the "How to write a tutorial for OpenCV?" tutorial. Made some corrections…

Added the "How to write a tutorial for OpenCV?" tutorial. Made some corrections to the feature2D TOC tree. Small visual improvements for the video-write.rst file. Deleted a definition file that served no purpose.

doc/tutorials/definitions/formatStyleSizeDef.rst

-.. |TOC_Image_Width| replace:: 100pt
-
-.. |TOC_Image_Height| replace:: 100pt
-
-.. |TOC

doc/tutorials/features2d/table_of_content_features2d/table_of_content_features2d.rst

@@ -191,7 +191,6 @@ Learn about how to use the feature points  detectors, descriptors and matching f
    :hidden:
 
    ../feature_description/feature_description
-   ../feature_detection/feature_detection
    ../trackingmotion/harris_detector/harris_detector
    ../feature_flann_matcher/feature_flann_matcher
    ../feature_homography/feature_homography
@@ -199,7 +198,6 @@ Learn about how to use the feature points  detectors, descriptors and matching f
    ../trackingmotion/generic_corner_detector/generic_corner_detector
    ../trackingmotion/corner_subpixeles/corner_subpixeles
    ../feature_detection/feature_detection
-   ../feature_detection/feature_description
    ../feature_flann_matcher/feature_flann_matcher
    ../feature_homography/feature_homography
    ../detection_of_planar_objects/detection_of_planar_objects

doc/tutorials/introduction/table_of_content_introduction/table_of_content_introduction.rst

@@ -177,6 +177,23 @@ Here you can read tutorials about how to set up your computer to work with the O
                    :height: 90pt
                    :width:  90pt
 
+* **Want to contribute, and see your own work between the OpenCV tutorials?**
+
+  =============== ======================================================
+   |HowToWriteT|  **Title:** :ref:`howToWriteTutorial`
+
+                  *Compatibility:* > OpenCV 1.0
+
+                  *Author:* |Author_BernatG| 
+
+                  If you already have a good grasp on using OpenCV and have made some projects that would be perfect presenting an OpenCV feature not yet part of these tutorials, here it is what you need to know.
+
+  =============== ======================================================
+
+  .. |HowToWriteT| image:: images/how_to_write_a_tutorial.png
+                   :height: 90pt
+                   :width:  90pt
+
 .. raw:: latex
 
    \pagebreak
@@ -194,3 +211,4 @@ Here you can read tutorials about how to set up your computer to work with the O
    ../android_binary_package/android_binary_package_using_with_NDK
    ../display_image/display_image
    ../load_save_image/load_save_image
+   ../how_to_write_a_tutorial/how_to_write_a_tutorial
\ No newline at end of file