Add pessimistic version constraints for all gems

Gemfile.lock

@@ -207,40 +207,40 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  RedCloth
-  aasm
-  actionpack-xml_parser (>= 1.0.1)
-  activerecord-deprecated_finders
-  acts_as_list
-  aruba (>= 0.5.4)
+  RedCloth (~> 4.2.9)
+  aasm (~> 3.4.0)
+  actionpack-xml_parser (~> 1.0.1)
+  activerecord-deprecated_finders (~> 1.0.3)
+  acts_as_list (~> 0.4.0)
+  aruba (~> 0.6.1)
   bcrypt (~> 3.1.7)
-  bullet
-  cache_digests
-  capybara
-  codeclimate-test-reporter
-  coffee-rails (~> 4.0)
-  cucumber-rails
-  database_cleaner
-  factory_girl_rails
-  htmlentities
-  jquery-rails
-  mocha
-  mysql2
-  rack-dev-mark
-  rack-mini-profiler
+  bullet (~> 4.13.2)
+  cache_digests (~> 0.3.1)
+  capybara (~> 2.4.3)
+  codeclimate-test-reporter (~> 0.4.1)
+  coffee-rails (~> 4.0.1)
+  cucumber-rails (~> 1.4.1)
+  database_cleaner (~> 1.3.0)
+  factory_girl_rails (~> 4.4.1)
+  htmlentities (~> 4.3.2)
+  jquery-rails (~> 3.1.2)
+  mocha (~> 1.1.0)
+  mysql2 (~> 0.3.16)
+  rack-dev-mark (= 0.7.3)
+  rack-mini-profiler (~> 0.9.2)
   rails (~> 4.1.6)
-  rails_autolink
-  rspec-expectations
-  sanitize
-  sass-rails (~> 4.0)
+  rails_autolink (~> 1.1.6)
+  rspec-expectations (~> 3.1.2)
+  sanitize (~> 3.0.2)
+  sass-rails (~> 4.0.3)
   selenium-webdriver
-  simplecov
-  spring
-  spring-commands-cucumber
-  sqlite3
-  swf_fu
+  simplecov (~> 0.9.1)
+  spring (~> 1.1.3)
+  spring-commands-cucumber (~> 1.0.1)
+  sqlite3 (~> 1.3.9)
+  swf_fu (~> 2.0.4)
   therubyracer
   tolk (~> 1.6.0)
-  uglifier (>= 1.3.0)
-  will_paginate
-  yard
+  uglifier (~> 2.5.3)
+  will_paginate (~> 3.0.7)
+  yard (~> 0.8.7.4)