update qr code system and add location setter for suppliers

app/views/supplier/edit.html.slim

@@ -1,3 +1,6 @@
+- content_for :head do
+  = javascript_include_tag 'https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false'
+
 = form_for @supplier, url: supplier_update_settings_path, html: {class: 'form-horizontal'} do |f|
   = render 'error_messages', target: current_supplier
   .control-group class=(@supplier.errors[:name].any? ? 'error' : nil)
@@ -8,6 +11,10 @@
     = f.label :email, class: 'control-label'
     .controls
       = f.text_field :email, class: 'text_field'
+  .control-group class=(@supplier.errors[:location].any? ? 'error' : nil)
+    = f.label :location, class: 'control-label'
+    .controls
+      = f.text_field :location, class: 'location_picker'
   .control-group class=(@supplier.errors[:offer_wifi].any? ? 'error' : nil)
     = f.label :offer_wifi, class: 'control-label'
     .controls