Changed the kcentroid object so that its default is to keep more linearly

independent vectors rather than newer vectors.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402940

dlib/svm/kcentroid.h

@@ -71,7 +71,7 @@ namespace dlib
             const kernel_type& kernel_, 
             scalar_type tolerance_ = 0.001,
             unsigned long max_dictionary_size_ = 1000000,
-            bool remove_oldest_first_ = true
+            bool remove_oldest_first_ = false 
         ) : 
             my_remove_oldest_first(remove_oldest_first_),
             kernel(kernel_), 

dlib/svm/kcentroid_abstract.h

@@ -58,7 +58,7 @@ namespace dlib
             const kernel_type& kernel_, 
             scalar_type tolerance_ = 0.001,
             unsigned long max_dictionary_size_ = 1000000,
-            bool remove_oldest_first_ = true
+            bool remove_oldest_first_ = false 
         );
         /*!
             requires