(DOCSP-12296) Add collection methods validate and mapReduce (#46)

* (DOCSP-12296) Add collection methods validate and mapReduce

Author: zach-carr

source/reference/methods.txt

@@ -135,7 +135,7 @@ Bulk Operation Methods
        :method:`Bulk.execute()`.
 
    * - :method:`Bulk.insert()`
-
+  
      - Adds an insert operation to a bulk operations list.
 
    * - :method:`Bulk.tojson()`
@@ -285,6 +285,10 @@ Collection Methods
 
      - Reports if a collection is a :term:`capped collection`.
 
+   * - :method:`db.collection.mapReduce()`
+     
+     - Runs :term:`map-reduce` aggregation operations on a collection.
+
    * - :method:`db.collection.reIndex()`
 
      - Rebuilds all existing indexes on a collection.
@@ -340,6 +344,10 @@ Collection Methods
 
      - Modifies multiple documents in a collection.
 
+   * - :method:`db.collection.validate()`
+     
+     - Validates a collection.
+
 Connection Methods
 ------------------