Add FontAwesome stylesheet and tag plugin

_includes/head.html

@@ -6,6 +6,7 @@
 	<title>{% if page.title %}{{ page.title }}{% else %}{{ site.title }}{% endif %}</title>
 
 	<link rel="stylesheet" href="{{ "/css/main.css" | prepend: site.baseurl }}">
+	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" type="text/css" />
 	<link rel="canonical" href="{{ page.url | replace:'index.html','' | prepend: site.baseurl | prepend: site.url }}">
 	<link href='https://fonts.googleapis.com/css?family=Open+Sans:400,300,700,800,600' rel='stylesheet' type='text/css'>
 	<link href='https://fonts.googleapis.com/css?family=Muli:400,300' rel='stylesheet' type='text/css'>

_plugins/font_awesome.rb

@@ -0,0 +1,71 @@
+##
+# The MIT License (MIT)
+# 
+# Copyright (c) 2014 Ryan Morrissey
+# 
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+# 
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+# 
+# 
+# Font Awesome Icons Liquid Tag
+# Documentation can be found at http://fontawesome.io/
+#
+# Example:
+#    {% icon fa-camera-retro %}
+#    {% icon fa-camera-retro fa-lg %}
+#    {% icon fa-spinner fa-spin %}
+#    {% icon fa-shield fa-rotate-90 %}
+
+module Jekyll
+  class FontAwesomeTag < Liquid::Tag
+
+    def render(context)
+      if tag_contents = determine_arguments(@markup.strip)
+        icon_class, icon_extra = tag_contents[0], tag_contents[1]
+        icon_tag(icon_class, icon_extra)
+      else
+        raise ArgumentError.new <<-eos
+Syntax error in tag 'icon' while parsing the following markup:
+
+  #{@markup}
+
+Valid syntax:
+  for icons: {% icon fa-camera-retro %}
+  for icons with size/spin/rotate: {% icon fa-camera-retro fa-lg %}
+eos
+      end
+    end
+
+    private
+
+    def determine_arguments(input)
+      matched = input.match(/\A(\S+) ?(\S+)?\Z/)
+      [matched[1].to_s.strip, matched[2].to_s.strip] if matched && matched.length >= 3
+    end
+
+    def icon_tag(icon_class, icon_extra = nil)
+      if icon_extra.empty?
+        "<i class=\"fa #{icon_class}\"></i>"
+      else
+        "<i class=\"fa #{icon_class} #{icon_extra}\"></i>"
+      end
+    end
+  end
+end
+
+Liquid::Template.register_tag('icon', Jekyll::FontAwesomeTag)