Delete site map and add to gitignore
Implement article reading time feature

- Also fixed some bad indentions in gruntfile.js
Add "links.hbs" snippet
Add social media sharing links to social.hbs
Fix some indention issues and add new mixin
General style tweaks

- Add mxim for user-select property
- Fix indention issues
- Change heart to be white on :hover
- Comment out unused styles
- Finish styles for reading time and wordcount
Comment out Kickstarter styles