Fix travis build

* Ruby 1.9 is no longer necessary as lon as Vagrant 1.4 comes with ruby 2.0
* Fix Bundler version to the latest version < 1.7
* Update compatibility matrix

.travis.yml

@@ -1,11 +1,15 @@
 language: ruby
 rvm:
-- 1.9.3
-- 2.0.0
-- 2.1.0
+  - 2.0.0
+  - 2.1.0
 before_install:
-- cd source
+  - gem install bundler -v 1.6.6
+  - cd source
 install:
-- travis_retry bundle install --without debug
+  - travis_retry bundle _1.6.6_ install --without debug
 script:
-- bundle exec rake
+  - bundle _1.6.6_ exec rake
+gemfile:
+  - gemfiles/minimal_release.gemfile
+  - gemfiles/previous_release.gemfile
+  - gemfiles/latest_stable.gemfile

source/gemfiles/latest_stable.gemfile

@@ -1,20 +1,10 @@
-# This file was generated by Appraisal
+source 'https://rubygems.org'
 
-source "https://rubygems.org"
-
-gem "appraisal", "1.0.0"
-gem "restclient", "0.10.0"
-gem "terminal-table", "1.4.5"
-gem "webmock", "~> 1.18.0", :group => [:test]
-gem "rubocop", "0.23.0", :require => false
-gem "vagrant", :git => "git://github.com/mitchellh/vagrant.git", :tag => "v1.4.3"
-gem "fakefs", "~> 0.5.2", :group => [:test]
-gem "sshkey", "~> 1.6.1"
-gem "colorize", "~> 0.7.3"
+gemspec :path => "../"
 
 group :development do
-  gem "coveralls", :require => false
-  gem "debugger"
+  gem 'vagrant', git: 'git://github.com/mitchellh/vagrant.git', tag: 'v1.6.5'
+  gem 'appraisal', '1.0.0'
+  gem 'rubocop', '0.23.0', require: false
+  gem 'coveralls', require: false
 end
-
-gemspec :path => "../"

source/gemfiles/minimal_release.gemfile

@@ -0,0 +1,10 @@
+source 'https://rubygems.org'
+
+gemspec :path => "../"
+
+group :development do
+  gem 'vagrant', git: 'git://github.com/mitchellh/vagrant.git', tag: 'v1.4.0'
+  gem 'appraisal', '1.0.0'
+  gem 'rubocop', '0.23.0', require: false
+  gem 'coveralls', require: false
+end

source/gemfiles/previous_release.gemfile

@@ -1,20 +1,10 @@
-# This file was generated by Appraisal
+source 'https://rubygems.org'
 
-source "https://rubygems.org"
-
-gem "appraisal", "1.0.0"
-gem "restclient", "0.10.0"
-gem "terminal-table", "1.4.5"
-gem "webmock", "~> 1.18.0", :group => [:test]
-gem "rubocop", "0.23.0", :require => false
-gem "vagrant", :git => "git://github.com/mitchellh/vagrant.git", :tag => "v1.4.3"
-gem "fakefs", "~> 0.5.2", :group => [:test]
-gem "sshkey", "~> 1.6.1"
-gem "colorize", "~> 0.7.3"
+gemspec :path => "../"
 
 group :development do
-  gem "coveralls", :require => false
-  gem "debugger"
+  gem 'vagrant', git: 'git://github.com/mitchellh/vagrant.git', tag: 'v1.5.4'
+  gem 'appraisal', '1.0.0'
+  gem 'rubocop', '0.23.0', require: false
+  gem 'coveralls', require: false
 end
-
-gemspec :path => "../"