Added a lot more tests for the kcentroid object.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402959

dlib/test/CMakeLists.txt

@@ -39,6 +39,7 @@ set (tests
    hash_set.cpp
    hash_table.cpp
    image.cpp
+   kcentroid.cpp
    lz77_buffer.cpp
    map.cpp
    matrix.cpp

dlib/test/makefile

@@ -49,6 +49,7 @@ SRC += hash_map.cpp
 SRC += hash_set.cpp
 SRC += hash_table.cpp
 SRC += image.cpp
+SRC += kcentroid.cpp
 SRC += lz77_buffer.cpp
 SRC += map.cpp
 SRC += matrix.cpp