Add item bookmark buttons (#14)

Implemented as a toggle button

- Move init_cap func where web can see it
- Bump version to alpha7

src/public/assets/style.css

@@ -79,10 +79,6 @@ main {
         margin-top: .25rem;
     }
 
-    .item_heading {
-        margin-bottom: 0;
-    }
-
     .item_published {
         margin-bottom: 1rem;
         line-height: 1.2;
@@ -153,3 +149,31 @@ code {
 p.back-link {
     margin-top: -1rem;
 }
+.item_heading {
+    margin-bottom: 0;
+
+    .bookmark {
+        padding: 0;
+        border: solid 1px black;
+        border-radius: .5rem;
+
+        &.add {
+            background-color: lightgray;
+            :hover {
+                background: linear-gradient(lightgreen, gray);
+            }
+        }
+        &.remove {
+            background: linear-gradient(lightgreen, green);
+            :hover {
+                background: linear-gradient(gray, lightgreen);
+            }
+        }
+
+        img {
+            max-width: 1.5rem;
+            max-height: 1.5rem;
+            padding: .5rem;
+        }
+    }
+}