Bump version to 2.2.0

Author: Marthyn

README.md

@@ -9,7 +9,7 @@ A gem that uses [angular-file-upload](https://github.com/nervgh/angular-file-upl
 Add this line to your application's Gemfile:
 
 ```ruby
-gem 'angularjs-file-upload-rails', '~> 1.1.6'
+gem 'angularjs-file-upload-rails', '~> 2.2.0'
 ```
 
 And then execute:
@@ -42,7 +42,7 @@ read more about the options in [angular-file-upload-wiki](https://github.com/ner
 \* *assuming that you have setup an ```angularjs``` correctly in your rails app
 
 ```ruby
-  gem 'angularjs-file-upload-rails', '~> 1.1.6'
+  gem 'angularjs-file-upload-rails', '~> 2.2.0'
   gem 'carrierwave'
   gem 'rails', '4.1.5'
 ```

angularjs-file-upload.gemspec

@@ -17,6 +17,6 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib", "app"]
 
   spec.add_development_dependency "bundler", "~> 1.3"
-  spec.add_development_dependency "rails", "~> 3.1"
+  spec.add_development_dependency "rails", ">= 3.1"
   spec.add_development_dependency "rake"
 end