Add roo-xls gem for Excel support

Gemfile

@@ -74,6 +74,7 @@ gem 'wkhtmltopdf-binary'
 gem 'foreigner'
 gem 'immigrant'
 gem 'roo', '~> 2.7.0'
+gem 'roo-xls'
 
 gem 'whenever', require: false
 

Gemfile.lock

@@ -596,6 +596,10 @@ GEM
     roo (2.7.1)
       nokogiri (~> 1)
       rubyzip (~> 1.1, < 2.0.0)
+    roo-xls (1.1.0)
+      nokogiri
+      roo (>= 2.0.0beta1, < 3)
+      spreadsheet (> 0.9.0)
     rspec (3.7.0)
       rspec-core (~> 3.7.0)
       rspec-expectations (~> 3.7.0)
@@ -626,6 +630,7 @@ GEM
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
+    ruby-ole (1.2.12.1)
     ruby-progressbar (1.8.1)
     rubyzip (1.2.1)
     safe_yaml (1.0.4)
@@ -643,6 +648,8 @@ GEM
       activesupport (>= 3.0.0)
     spinjs-rails (1.3)
       rails (>= 3.1)
+    spreadsheet (1.1.4)
+      ruby-ole (>= 1.0)
     sprockets (2.2.3)
       hike (~> 1.2)
       multi_json (~> 1.0)
@@ -775,6 +782,7 @@ DEPENDENCIES
   representative_view
   roadie-rails (~> 1.0.3)
   roo (~> 2.7.0)
+  roo-xls
   rspec-rails (>= 3.5.2)
   rspec-retry
   rubocop (>= 0.49.1)