Unify slugify()

Provides a new util.js file with a unified `slugify()` function that also
lowercases the slug. Change all uses of `slugify()` to use this instead.

src/Article.js

@@ -3,9 +3,9 @@ import React, { Component } from 'react';
 import Icon from 'react-fontawesome';
 import Markdown from 'react-markdown';
 import { Link } from 'react-router-dom';
-import slugify from 'slugify';
 
 import { ListLink } from './Nav';
+import { slugify } from './util';
 
 
 class Article extends Component {

src/Nav.js

@@ -1,10 +1,10 @@
 import React, { Component } from 'react';
 import { Link } from 'react-router-dom';
-import slugify from 'slugify';
 
 import Icon from 'react-fontawesome';
 
 import { Row } from './skeleton';
+import { slugify } from './util';
 
 
 class ListLink extends Component {
@@ -36,7 +36,7 @@ class NavList extends Component {
         for (let page of blob.pages) {
           let slug = page.slug;
           if (!slug) {
-            slug = slugify(page.title).toLowerCase();
+            slug = slugify(page.title);
           }
 
           if (page.parent == null) {

src/Page.js

@@ -1,9 +1,9 @@
 import hljs from 'highlight.js';
 import React, { Component } from 'react';
 import Markdown from 'react-markdown';
-import slugify from 'slugify';
 
 import { NotFound } from './NotFound';
+import { slugify } from './util';
 
 
 class Page extends Component {
@@ -25,7 +25,7 @@ class Page extends Component {
         for (let page of blob.pages) {
           let slug = page.slug;
           if (!slug) {
-            slug = slugify(page.title).toLowerCase();
+            slug = slugify(page.title);
           }
 
           if (slug === this.params.slug) {

src/Post.js

@@ -1,9 +1,9 @@
 import React, { Component } from 'react';
-import slugify from 'slugify';
 
 import { Article } from './Article';
 import { HistoryNav } from './Nav';
 import { NotFound } from './NotFound';
+import { slugify } from './util';
 
 
 class Post extends Component {

src/util.js

@@ -0,0 +1,9 @@
+import baseSlugify from 'slugify';
+
+
+function slugify(s) {
+  // Slugify a string to our specs. Hooray consistency!
+  return baseSlugify(s).toLowerCase();
+}
+
+export { slugify };