Add reducers descriptions

docs/layers/reducers.md

@@ -1,3 +1,47 @@
 # Reducers
 
 This layer is included reducers of entities. [Reducers](http://redux.js.org/docs/basics/Reducers.html) specify how the application's state changes in response.
+
+## authorizeReducer.jsx
+
+This reducer is responsible to change user authorization state on reducer.
+
+## circleReducer.jsx
+
+This reducer is responsible to change user's circle state on reducer, insert/update/delete circle and insert/update/delete follower/following.
+
+## commentReducer.jsx
+
+This reducer is responsible to change user comment state on reducer, insert/update/delete comment.
+
+## fileReducer.jsx
+
+This reducer is responsible to change files state on reducer.
+
+## globalReducer.jsx
+
+This reducer is responsible to change global states on reducer. Like changing loding visibility or notification text.
+
+## imageGalleryReducer.jsx
+
+This reducer is responsible to change images state on reducer, insert/update/delete image and cache image's url.
+
+## imageUploaderReducer.jsx
+
+This reducer is responsible to change user upload state on reducer.
+
+## notifyReducer.jsx
+
+This reducer is responsible to change user notification state on reducer, insert/update/delete notificaion and change seen state for notification.
+
+## postReducer.jsx
+
+This reducer is responsible to change user post state on reducer, insert/update/delete post.
+
+## userReducer.jsx
+
+This reducer is responsible to change user information state on reducer, insert/update/delete user information.
+
+## voteReducer.jsx
+
+This reducer is responsible to change user vote state on reducer. insert/update/delete vote.