Add CSS for a missing device size: less than 321px width

Author: yasulab

app/assets/stylesheets/custom.scss

@@ -47,9 +47,16 @@ div #README{
     list-style-type: none;
     display: inline-block;
     padding-top: 20px;
-    width:  300px;
-    height: 120px;
 
+    @media only screen and (min-width: 0px) {
+      margin-left: -5px;
+      width:  260px;
+      height: 120px;      
+    }
+    @media only screen and (min-width: 321px) {
+      width:  300px;
+      height: 120px;      
+    }
     @media only screen and (min-width: 560px) {
       padding: 20px  0px 0px  0px;
       margin:   0px  0px 0px  0px;