Add support for Destiny Entity (#21)

* add support for entity definition manifest endpoint

* update get_destiny_entity_definition description

* added destiny entity def to readme

README.md

@@ -152,6 +152,21 @@ Get the current version of the manifest. This api call shouldn't be needed much,
 
 ---
 
+> get_destiny_entity_definition(entity_type, hash_identifier)
+
+This function is a coroutine.
+
+Returns the static definition of an entity of the given Type and hash identifier
+
+**Parameters**
+- `entity_type` - The type of entity - ex. 'DestinyInventoryItemDefinition'
+- `hash_identifier` - The hash identifier for the specific Entity you want returned.
+
+**Response**: 
+See [Destiny2.GetDestinyEntityDefinition](https://bungie-net.github.io/multi/schema_Destiny-Definitions-DestinyDefinition.html#schema_Destiny-Definitions-DestinyDefinition)
+
+---
+
 > search_destiny_entities(entity_type, search_term, page=0)
 
 This function is a coroutine.

pydest/api.py

@@ -79,7 +79,33 @@ async def get_destiny_manifest(self):
         url = DESTINY2_URL + 'Manifest'
         return await self._get_request(url)
 
+
+    async def get_destiny_entity_definition(self, entity_type, hash_identifier):
+        """Returns the static definition of an entity of the given Type and hash identifier. 
+        Examine the API Documentation for the Type Names of entities that have their own definitions. 
+        Note that the return type will always *inherit from* DestinyDefinition, but the specific type 
+        returned will be the requested entity type if it can be found. Please don't use this as a chatty 
+        alternative to the Manifest database if you require large sets of data, but for simple and one-off 
+        accesses this should be handy.
 
+        Args:
+            entity_type:
+                The type of entity for whom you would like results. These correspond to the entity's 
+                definition contract name. For instance, if you are looking for items, this property 
+                should be 'DestinyInventoryItemDefinition'. PREVIEW: This endpoint is still in beta, 
+                and may experience rough edges. The schema is tentatively in final form, but there may 
+                be bugs that prevent desirable operation.
+            hash_identifier:
+                The hash identifier for the specific Entity you want returned.
+
+        Returns:
+            json (dict)
+        """
+        url = DESTINY2_URL + 'Manifest/{}/{}/'
+        url = url.format(entity_type, hash_identifier)
+        return await self._get_request(url)
+
+
     async def search_destiny_entities(self, entity_type, search_term, page=0):
         """Gets a page list of Destiny items
 
@@ -378,4 +404,4 @@ async def get_activity_history(self, membership_type, membership_id, character_i
         """
         # /{membershipType}/Account/{destinyMembershipId}/Character/{characterId}/Stats/Activities/
         url = DESTINY2_URL + '{}/Account/{}/Character/{}/Stats/Activities/?mode={}&count={}&page={}'.format(membership_type, membership_id, character_id, mode, count, page)
-        return await self._get_request(url)
+        return await self._get_request(url)