Checked avatar, post.category, add title

Author: x1wins

README.md

@@ -94,12 +94,12 @@ TODO
 - [x] User scaffold
     - [x] User scaffold and JWT for user authenticate Gem https://github.com/x1wins/jwt-rails
     - [x] User role http://railscasts.com/episodes/189-embedded-association?view=asciicast https://github.com/ryanb/cancan/wiki/Role-Based-Authorization
-    - [ ] avator file upload
+    - [x] avatar file upload
     - [ ] generate uninque username https://alexcastano.com/generate-unique-usernames-for-ruby-on-rails/
 - [x] Category scaffold
-    - [ ] fix post.category serialize
+    - [x] fix post.category serialize
 - [x] Post scaffold
-    - [ ] add title column
+    - [x] add title column
 - [x] Comment scaffold
     - [ ] add depth
     - [ ] file upload