Adding inline documentation for clean-deep

src/CleanDeep.rei

@@ -1,3 +1,14 @@
+/** [bs-clean-deep] is bindings for {{: https://github.com/nunofgs/clean-deep } [clean-deep]},
+    a library for removing empty or nullable values from javascript objects.
+
+    [clean-deep] uses lodash ([isempty] and [isplainobject]) in addition to
+    checking for empty and nullable values to perform the actual cleaning of
+    JS-objects.
+ */
+
+/** Removing empty or nullable values from javascript objects. Set any of the
+    parameters to [false] to exclude that type from being cleaned.
+ */
 let cleanDeep:
   (
     ~emptyArrays: bool=?,