Update .travis.yml & Gemfile

.travis.yml

@@ -1,5 +1,6 @@
-bundler_args: --without guard
-
+language: ruby
+bundler_args: --without development
+script: 'bundle exec rake --trace 2>&1'
 rvm:
   - 1.8.7
   - 1.9.2
@@ -12,7 +13,3 @@ rvm:
 branches:
   only:
     - master
-# notifications:
-#   recipients:
-#     - thibaud@thibaud.me
-#     - rymai@rymai.me

Gemfile

@@ -1,4 +1,4 @@
-source :rubygems
+source 'https://rubygems.org'
 
 gemspec
 
@@ -7,8 +7,7 @@ gem 'rdoc'
 
 require 'rbconfig'
 
-group :guard do
-  gem 'guard'
+group :development do
   gem 'guard-test'
 
   if RbConfig::CONFIG['target_os'] =~ /darwin/i