Update CHANGELOG for 1.5.0

Author: carmenlau

CHANGELOG.md

@@ -0,0 +1,37 @@
+## 1.5.0 (2018-05-16)
+
+### Features
+
+    - API updates:
+        - Update getMessages api with cache support #94, #131
+        - Introduce message operation cache objects for fail operation handling #130, #131, #132
+        - Fetch participants api with cache support #153, #154
+        - Add `subscribeToConversation` and `subscribeToUserChannel` function #195
+    - UIKit updates:
+        - Support UI and Text customization support in ConversationView
+        - Update UIKit with local cache
+
+### Bug Fixes
+
+    - API updates:
+        - Update admin id option keys of chat:create_conversation SkygearIO/chat#192
+    - UIKit updates:
+        - Fix android 4 sending image from camera bug, grant Read & Write permission manually #162
+        - Fix bubble color in android 4, should not allow user send out empty
+        - Fix cannot load the image in image view in android 4 #163
+        - Fail trailing space username make the app crash bug #163
+        - Image rotation bug fix and refactor the message constructing in conversation view
+    - Voice message bug fix #152 #158
+
+### Other Notes
+
+    - API updates:
+        - Rename ChatUser to Participant #170
+        - Update API callback, rename function `onSucc` to `onSuccess` #121
+        - Support beforeMessageID parameter for query messages #140
+        - ChatContainer.editMessage() accepts metadata and asset #31
+    - Example updates:
+        - Update chat example with api test
+        - Improve admin and participant list display #164
+    - Separate UI Kit Classes from chat project
+