updated docs

docs/docs/algorithms.xml

@@ -59,6 +59,7 @@
                <item>resize_rect_height</item> 
                <item>move_rect</item> 
                <item>nearest_point</item> 
+               <item>distance_to_rect_edge</item> 
             </sub>
          </item>
          <item nolink="true">
@@ -659,6 +660,20 @@
                                  
       </component>
 
+   <!-- ************************************************************************* -->
+
+      <component>
+         <name>distance_to_rect_edge</name>
+         <file>dlib/geometry.h</file>
+         <spec_file link="true">dlib/geometry/rectangle_abstract.h</spec_file>
+         <description>        
+            This function takes a <a href="#rectangle">rectangle</a> and a 
+            <a href="#point">point</a> and returns the Manhattan distance between
+            the rectangle's edge and the point.
+         </description>
+                                 
+      </component>
+
    <!-- ************************************************************************* -->
 
       <component>

docs/docs/term_index.xml

@@ -23,6 +23,7 @@
          <term file="dlib/geometry/rectangle_abstract.h.html" name="resize_rect_height"/>
          <term file="dlib/geometry/rectangle_abstract.h.html" name="centered_rect"/>
          <term file="dlib/geometry/rectangle_abstract.h.html" name="nearest_point"/>
+         <term file="dlib/geometry/rectangle_abstract.h.html" name="distance_to_rect_edge"/>
          <term file="dlib/geometry/rectangle_abstract.h.html" name="shrink_rect"/>
          <term file="dlib/geometry/rectangle_abstract.h.html" name="grow_rect"/>