Add font awesome

Gemfile

@@ -88,3 +88,5 @@ gem 'high_voltage', '~> 2.4.0'
 
 # Errors on errbit
 gem 'airbrake'
+
+gem 'font-awesome-sass'

Gemfile.lock

@@ -101,6 +101,8 @@ GEM
       i18n (~> 0.5)
     faraday (0.9.1)
       multipart-post (>= 1.2, < 3)
+    font-awesome-sass (4.4.0)
+      sass (>= 3.2)
     globalid (0.3.6)
       activesupport (>= 4.1.0)
     haml (4.0.7)
@@ -292,6 +294,7 @@ DEPENDENCIES
   devise
   factory_girl_rails
   faker
+  font-awesome-sass
   haml-rails (~> 0.9)
   high_voltage (~> 2.4.0)
   jbuilder (~> 2.0)

app/views/users/show.html.haml

@@ -6,6 +6,8 @@
   .panel-body
     .pure-g
       .bound.input-listen.pure-u-1{ 'data-input-type': 'date-range' }
+        %fieldset.pure-group-inline
+          %span.fa.fa-calendar.pure-group-addon
           %input.lower-bound{type: 'date', placeholder: 'after'}
         \-
         %input.upper-bound{type: 'date', placeholder: 'before'}