try avatar at high level and configur asset for posts

Author: sineeli

_config.icarus.yml

@@ -237,7 +237,7 @@ widgets:
         # Author's current location
         location: Dallas, TX
         # URL or path to the avatar image
-        avatar: 
+        avatar: /img/avatar.png
         # Whether show the rounded avatar image
         avatar_rounded: true
         # Email address for the Gravatar

_config.yml

@@ -40,7 +40,7 @@ external_link:
   exclude: ''
 filename_case: 0
 render_drafts: false
-post_asset_folder: false
+post_asset_folder: true
 relative_link: false
 future: true
 syntax_highlighter: highlight.js