fix(new): Pages start as md by default

This is to make our life easier for future changes so we can assume what
the extension should be.  Eventually we'll need to make this complex
again.

src/new.rs

@@ -50,20 +50,15 @@ draft: true
 Welcome to the first post ever on cobalt.rs!
 ";
 
-const INDEX_LIQUID: &'static [u8] = b"extends: default.liquid
+const INDEX_MD: &'static [u8] = b"extends: default.liquid
 ---
-<div >
-  <h2>Blog!</h2>
-  <!--<br />-->
-  <div>
-    {% for post in posts %}
-      <div>
-        <h4>{{post.title}}</h4>
-        <h4><a href=\"{{post.path}}\">{{ post.title }}</a></h4>
-      </div>
-    {% endfor %}
-  </div>
-</div>
+## Blog!
+
+{% for post in posts %}
+#### {{post.title}}
+
+#### [{{ post.title }}]({{ post.path }})
+{% endfor %}
 ";
 
 pub fn create_new_project<P: AsRef<Path>>(dest: P) -> Result<()> {
@@ -74,7 +69,7 @@ pub fn create_new_project_for_path(dest: &Path) -> Result<()> {
     fs::create_dir_all(dest)?;
 
     create_file(&dest.join(".cobalt.yml"), COBALT_YML)?;
-    create_file(&dest.join("index.liquid"), INDEX_LIQUID)?;
+    create_file(&dest.join("index.md"), INDEX_MD)?;
 
     fs::create_dir_all(&dest.join("_layouts"))?;
     create_file(&dest.join("_layouts/default.liquid"), DEFAULT_LAYOUT)?;
@@ -91,7 +86,7 @@ pub fn create_new_document(doc_type: &str, name: &str, config: &Config) -> Resul
     let full_path = &path.join(&config.posts.dir).join(name);
 
     match doc_type {
-        "page" => create_file(name, INDEX_LIQUID)?,
+        "page" => create_file(name, INDEX_MD)?,
         "post" => create_file(full_path, POST_MD)?,
         _ => bail!("Unsupported document type {}", doc_type),
     }