DOC: added files for a new recipe for hyperspectral image processing

Documentation/Cookbook/rst/Recipes.rst

@@ -18,3 +18,4 @@ and demonstrate how they can be applied.
    recipes/pbclassif.rst
    recipes/featextract.rst
    recipes/stereo.rst
+   recipes/hyperspectral.rst

Documentation/Cookbook/rst/recipes/hyperspectral.rst

+Hyperspectral image processing
+==============================
+
+Unmixing
+--------
+
+Anomaly detection
+-----------------