Add markdown format support (#25)

Co-authored-by: Dawid Dziurla <dawidd0811@gmail.com>

node_modules/showdown/bower.json

@@ -0,0 +1,32 @@
+{
+    "name": "showdown",
+    "description": "A Markdown to HTML converter written in Javascript",
+    "homepage": "https://github.com/showdownjs/showdown",
+    "authors": [
+      "Estevão Santos (https://github.com/tivie)",
+      "Pascal Deschênes (https://github.com/pdeschen)"
+    ],
+    "main": ["dist/showdown.js"],
+    "ignore": [
+      ".editorconfig",
+      ".gitattributes",
+      ".gitignore",
+      ".jscs.json",
+      ".jshintignore",
+      ".jshintrc",
+      ".travis.yml",
+      "Gruntfile.js",
+      "package.json",
+      "test/*"
+    ],
+    "repository": {
+      "type": "git",
+      "url": "https://github.com/showdownjs/showdown.git"
+    },
+    "keywords": [
+      "markdown",
+      "md",
+      "mdown"
+    ],
+    "license": "https://github.com/showdownjs/showdown/blob/master/license.txt"
+}