Switch to pulldown-cmark for markdown parsing + Try to parse mentions

It's not working correctly yet for some reason…

src/routes/posts.rs

@@ -1,4 +1,3 @@
-use comrak::{markdown_to_html, ComrakOptions};
 use heck::KebabCase;
 use rocket::request::Form;
 use rocket::response::{Redirect, Flash};
@@ -88,19 +87,7 @@ fn create(blog_name: String, data: Form<NewPostForm>, user: User, conn: DbConn)
         if slug == "new" || Post::find_by_slug(&*conn, slug.clone(), blog.id).is_some() {
             Redirect::to(uri!(new: blog = blog_name))
         } else {
-            let content = markdown_to_html(form.content.to_string().as_ref(), &ComrakOptions{
-                smart: true,
-                safe: true,
-                ext_strikethrough: true,
-                ext_tagfilter: true,
-                ext_table: true,
-                ext_autolink: true,
-                ext_tasklist: true,
-                ext_superscript: true,
-                ext_header_ids: Some("title".to_string()),
-                ext_footnotes: true,
-                ..ComrakOptions::default()
-            });
+            let content = utils::md_to_html(form.content.to_string().as_ref());
 
             let post = Post::insert(&*conn, NewPost {
                 blog_id: blog.id,