Add fuzzy query doc.

docs/Query/Fuzzy.md

+# Fuzzy Query
+
+> More info about fuzzy query is in the [official elasticsearch docs][1]
+
+The fuzzy query uses similarity based on Levenshtein edit distance for string fields, and a +/- margin on numeric and
+date fields.
+
+## Simple example
+
+```JSON
+{
+    "fuzzy" : { "user" : "ki" }
+}
+```
+
+In DSL:
+
+```php
+$fuzzyQuery = new FuzzyQuery('user', 'ki');
+
+$search = new Search();
+$search->addQuery($fuzzyQuery);
+
+$queryArray = $search->toArray();
+```
+
+## With more advanced settings
+
+```JSON
+{
+    "fuzzy" : {
+        "user" : {
+            "value" :         "ki",
+            "boost" :         1.0,
+            "fuzziness" :     2,
+            "prefix_length" : 0,
+            "max_expansions": 100
+        }
+    }
+}
+```
+
+In DSL
+```php
+$fuzzyQuery = new FuzzyQuery(
+    'user',
+    'ki',
+    [
+        'boost' => 1,
+        'fuzziness' => 2,
+        'prefix_length' => 0,
+        'max_expansions' => 100,
+    ]
+);
+
+
+$search = new Search();
+$search->addQuery($fuzzyQuery);
+
+$queryArray = $search->toArray();
+```
+
+[1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-fuzzy-query.html