Include limited contrib/ directory

Cmake integration included a first contributed filter(s), building contrib
requires the CMake option :

-DWITH_CONTRIBS:BOOL=ON (this one is OFF by default).

Added 4 new contributed filters :

* Median-MAD rejection in 3D 3x3x3 box size
* Median-MAD rejection in 2D but variable box size
* OpenCL 1-liner and multi-input filter
* Monitoring statistics of an image stream (min, max, mean, var)

1 files changed, 3 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 15bd539..367fb83 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -69,4 +69,7 @@ endif ()
 add_subdirectory(docs)
 add_subdirectory(deps)
 add_subdirectory(src)
+if ("${WITH_CONTRIBS}")
+    add_subdirectory(contribs)
+endif ()
 #}}}