Update Gemfile with dependencies

medium-editor-rails.gemspec

@@ -3,18 +3,19 @@ lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'medium-editor-rails/version'
 
-Gem::Specification.new do |s|
-  s.name          = 'medium-editor-rails'
-  s.version       = MediumEditorRails::Rails::VERSION
-  s.authors       = ['Ahmet Sezgin Duran']
-  s.email         = ['[email protected]']
-  s.summary       = %q{Medium Editor integrated in Rails asset pipeline}
-  s.description   = s.summary
-  s.homepage      = 'https://github.com/marjinal1st/medium-editor-rails'
-  s.license       = 'MIT'
+Gem::Specification.new do |gem|
+  gem.name          = 'medium-editor-rails'
+  gem.version       = MediumEditorRails::Rails::VERSION
+  gem.authors       = ['Ahmet Sezgin Duran']
+  gem.email         = ['[email protected]']
+  gem.summary       = %q{Medium Editor integrated in Rails asset pipeline}
+  gem.description   = gem.summary
+  gem.homepage      = 'https://github.com/marjinal1st/medium-editor-rails'
+  gem.license       = 'MIT'
 
-  s.files         = `git ls-files`.split($/)
-  s.executables   = s.files.grep(%r{^bin/}) { |f| File.basename(f) }
-  s.test_files    = s.files.grep(%r{^(test|spec|features)/})
-  s.require_paths = ['lib']
-end
+  gem.files         = `git ls-files`.split($/)
+  gem.require_paths = ['lib']
+
+  gem.add_dependency 'railties', '~> 3.0'
+  gem.add_development_dependency 'bundler', '~> 1.0'
+end