Upgrading docs return value schema. Added button template for tutorial and screencast on ladder.

app/styles/play/ladder.sass

@@ -4,3 +4,7 @@
     
   .play-button
     margin-bottom: 10px
+
+  .intro-button
+    width: 45%
+    margin: 0 2.5%

app/templates/play/ladder.jade

@@ -6,6 +6,10 @@ block content
     div#level-description
       !{description}
   
+    a(href="something").intro-button.btn.btn-primary.btn-lg Watch the Video
+    
+    a(href="somethingelse").intro-button.btn.btn-primary.btn-lg Play the Tutorial
+
   hr
   div#columns.row
     for team in teams

app/templates/play/level/tome/spell_palette_entry_popover.jade

@@ -42,3 +42,14 @@ if doc.args && doc.args.length
             em Default value: 
             code= arg.default
     
+if doc.returns
+  p.returns
+    strong Returns: 
+    div
+      code= doc.returns.type
+      if doc.returns.example
+        |  (ex: 
+        code= doc.returns.example
+        | )
+      if doc.returns.description
+        div!= marked(doc.returns.description)

server/levels/components/level_component_schema.coffee

@@ -30,6 +30,15 @@ PropertyDocumentationSchema = c.object {
   args: c.array {title: "Arguments", description: "If this property has type 'function', then provide documentation for any function arguments."}, c.FunctionArgumentSchema
   owner: {title: "Owner", type: 'string', description: 'Owner of the property, like "this" or "Math".'}
   example: {title: "Example", type: 'string', description: 'An optional example code block.', format: 'javascript'}
+  returns: c.object {
+    title: "Return Value"
+    description: 'Optional documentation of any return value.'
+    required: ['type']
+    default: {type: 'null'}
+  },
+    type: c.shortString(title: "Type", description: "Type of the return value")
+    example: c.shortString(title: "Example", description: "Example return value")
+    description: {title: "Description", type: 'string', description: "Description of the return value.", maxLength: 1000}
 
 DependencySchema = c.object {
   title: "Component Dependency"