Update Gemfile versions where it doesn't break things

Gemfile

@@ -40,9 +40,9 @@ gem 'whenever', require: false # For defining cronjobs, see config/schedule.rb
 gem 'protected_attributes', '= 1.1.0' # 1.1.0 until tests work work with higher versions
 gem 'ruby-units'
 gem 'attribute_normalizer'
-gem 'ice_cube', '~> 0.13.0'
+gem 'ice_cube'
 gem 'recurring_select'
-gem 'roo', '~> 2.0.0'
+gem 'roo'
 gem 'roo-xls'
 gem 'spreadsheet'
 gem 'gaffe'

Gemfile.lock

@@ -184,7 +184,7 @@ GEM
       i18n (~> 0.6, >= 0.6.6)
     i18n-spec (0.6.0)
       iso
-    ice_cube (0.13.3)
+    ice_cube (0.14.0)
     inherited_resources (1.6.0)
       actionpack (>= 3.2, < 5)
       has_scope (~> 0.6.0.rc)
@@ -331,7 +331,7 @@ GEM
       redis-namespace (~> 1.3)
       sinatra (>= 0.9.2)
       vegas (~> 0.1.2)
-    roo (2.0.1)
+    roo (2.4.0)
       nokogiri (~> 1)
       rubyzip (~> 1.1, < 2.0.0)
     roo-xls (1.0.0)
@@ -494,7 +494,7 @@ DEPENDENCIES
   haml-rails
   i18n-js (~> 3.0.0.rc8)
   i18n-spec
-  ice_cube (~> 0.13.0)
+  ice_cube
   inherited_resources
   jquery-rails
   kaminari
@@ -517,7 +517,7 @@ DEPENDENCIES
   ransack
   recurring_select
   resque
-  roo (~> 2.0.0)
+  roo
   roo-xls
   rspec-core (~> 3.2)
   rspec-rails