Bugfix/fixing some https stuff (#214)

* adding the code for dc hack night calendar to the home page

* Adding a new project ideas page
Rearranging items in navbar

* Moving slack sign ups to its own page

* Updating the data portal links

* HTTPS all the things

Author: mkalish

_config.yml

@@ -1,5 +1,5 @@
 name: Code for DC
-url: http://codefordc.org
+url: https://codefordc.org
 markdown: kramdown
 highlighter: rouge
 paginate: 10

assets/css/style.css

@@ -2,7 +2,7 @@
 /*  general/sitewide */
 /***************************/
 
-@import url(http://fonts.googleapis.com/css?family=Raleway:600,700);
+@import url(https://fonts.googleapis.com/css?family=Raleway:600,700);
 
 body {
   padding-top: 50px;