Add appraisal gem and config

.gitignore

@@ -4,6 +4,7 @@
 .config
 .yardoc
 Gemfile.lock
+gemfiles/*.lock
 InstalledFiles
 _yardoc
 coverage

.travis.yml

@@ -2,3 +2,7 @@ language: ruby
 rvm:
   - 1.9.3
   - rbx-19mode
+gemfile:
+  - gemfiles/rails_3.gemfile
+  - gemfiles/rails_4.0.gemfile
+  - gemfiles/rails_4.1.gemfile

Appraisals

@@ -0,0 +1,11 @@
+appraise 'rails-3' do
+  gem 'rails', '~> 3.1'
+end
+
+appraise 'rails-4.0' do
+  gem 'rails', '~> 4.0.0'
+end
+
+appraise 'rails-4.1' do
+  gem 'rails', '~> 4.1.0'
+end

gemfiles/rails_3.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rails", "~> 3.1"
+
+gemspec :path => "../"

gemfiles/rails_4.0.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rails", "~> 4.0.0"
+
+gemspec :path => "../"

gemfiles/rails_4.1.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rails", "~> 4.1.0"
+
+gemspec :path => "../"

kalendae_assets.gemspec

@@ -15,6 +15,7 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.version       = KalendaeAssets::VERSION
   gem.add_dependency 'rails', '>= 3.1'
+  gem.add_development_dependency 'appraisal'
   gem.add_development_dependency 'sqlite3'
   gem.add_development_dependency 'minitest'
   gem.add_development_dependency 'capybara'