Implemented edit and update for entries.

- Added ts_entry:delete/1 to delete an entry from the database.
- Implemented ts_api:delete_entry/3.
- Added a form to facilitate editing individual entries.
- Moved the small show/hide functions directly into the HTML.
- Wired up the update timeline form.
- Wired up the edit and update entry form.

www/css/ts-screen.scss

@@ -264,7 +264,7 @@ body {
         background: $obor;
         color: lighten($greyTxt, 40%);
         font-weight: bold;
-        min-width: 2em;
+        width: 2em;
         text-align: right;
     }
 
@@ -283,6 +283,19 @@ body {
             padding-left: 1.5em;
         }
     }
+
+    .entry-edit {
+        display: none;
+
+        .id {
+            width: 2em;
+            padding: 0.2em 0.5em 0.2em 0.5em;
+        }
+
+        .entry-notes {
+            padding: 0;
+        }
+    }
 }
 
 .top-entry {