Update gemspec

rbzmq.gemspec

@@ -8,18 +8,16 @@ Gem::Specification.new do |spec|
   spec.version       = RbZMQ::VERSION
   spec.authors       = ['Jan Graichen']
   spec.email         = ['jg@altimos.de']
-  spec.summary       = %q{TODO: Write a short summary. Required.}
-  spec.description   = %q{TODO: Write a longer description. Optional.}
-  spec.homepage      = ''
+  spec.summary       = %q{An opinionated ruby library wrapping ffi-rzmq for more rubish flair.}
+  spec.description   = %q{An opinionated ruby library wrapping ffi-rzmq for more rubish flair.}
+  spec.homepage      = 'https://github.com/jgraichen/rbzmq'
   spec.license       = 'LGPLv3'
 
   spec.files         = Dir['**/*'].grep(%r{^((bin|lib|test|spec|features)/|.*\.gemspec|.*LICENSE.*|.*README.*|.*CHANGELOG.*)})
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'nio4r', '~> 1.0'
-  spec.add_runtime_dependency 'concurrent-ruby', '~> 0.5'
   spec.add_runtime_dependency 'ffi-rzmq', '~> 2.0'
 
   spec.add_development_dependency 'bundler', '~> 1.5'