update readme and dependencies

.gitignore

@@ -7,3 +7,4 @@
 /pkg/
 /spec/reports/
 /tmp/
+*.gem

README.md

@@ -2,6 +2,9 @@
 This repository is a version of the Saasu software development kit in the Ruby language, for working with the Saasu API.
 For help on the API itself, you can look at the [help documentation](https://api.saasu.com/)
 
+[![Gem Version](https://badge.fury.io/rb/saasu2.svg)](http://badge.fury.io/rb/saasu2)
+[![Build Status](https://travis-ci.org/nsinenko/saasu-rails.svg?branch=master)](https://travis-ci.org/nsinenko/saasu-rails)
+
 ## Installation
 
 Add this line to your application's Gemfile:

saasu2.gemspec

@@ -12,13 +12,14 @@ Gem::Specification.new do |spec|
   spec.summary       = %q{Ruby wrapper for Saasu API.}
   spec.homepage      = "https://api.saasu.com"
   spec.license       = "MIT"
+  spec.required_ruby_version = ">= 1.9.0"
 
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_development_dependency "bundler", "~> 1.9"
+  spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rspec"
   spec.add_development_dependency 'byebug', '3.2.0'