Disable unnecessary gems. Remove Gemfile.lock.

.gitignore

@@ -14,6 +14,9 @@ doc
 # jeweler generated
 pkg
 
+# Bundler generated
+Gemfile.lock
+
 # Have editor/IDE/OS specific files you need to ignore? Consider using a global gitignore: 
 #
 # * Create a file at ~/.gitignore

Gemfile

@@ -1,24 +1,28 @@
-source "http://rubygems.org"
+source 'http://rubygems.org'
 
-gem "archive-tar-minitar", "~> 0.5.0"
-gem "rye", "~> 0.9.0"
+gem 'archive-tar-minitar', '~> 0.5.0'
+gem 'rye', '~> 0.9.0'
 
 group :development do
-  gem "rake"
+  gem 'rake'
 
-  gem "bluecloth", "~> 2.2.0"
-  gem "rspec", "~> 2.10.0"
-  gem "yard", "~> 0.8.0"
-  gem "jeweler", "~> 1.8.0"
+  gem 'bluecloth', '~> 2.2.0'
+  gem 'rspec', '~> 2.10.0'
+  gem 'yard', '~> 0.8.0'
+  gem 'jeweler', '~> 1.8.0'
 
-  platform :mri_18 do
-    gem 'rcov', :require => false
-    gem 'ruby-debug'
-  end
+  # OPTIONAL LIBRARIES: These libraries upset travis-ci and may cause Ruby or
+  # RVM to hang, so only use them when needed.
+  if ENV['DEBUGGER']
+    platform :mri_18 do
+      gem 'rcov', :require => false
+      gem 'ruby-debug'
+    end
 
-  platform :mri_19 do
-    gem 'simplecov', :require => false
-    gem 'debugger-ruby_core_source'
-    gem 'debugger'
+    platform :mri_19 do
+      gem 'simplecov', :require => false
+      gem 'debugger-ruby_core_source'
+      gem 'debugger'
+    end
   end
 end