add gemspec

periodicity.gemspec

@@ -0,0 +1,14 @@
+# -*- encoding: utf-8 -*-
+require File.expand_path('../lib/periodicity/version', __FILE__)
+
+Gem::Specification.new do |gem|
+  gem.name        = 'periodicity'
+  gem.version     = Periodicity::VERSION
+  gem.description = gem.summary = "Job scheduler for Rails"
+  gem.authors     = ["Dzmitry Plashchynski"]
+  gem.email       = "plashchynski@gmail.com"
+  gem.files       = `git ls-files`.split("\n")
+  gem.require_paths = ["lib"]
+  gem.homepage    = "https://github.com/plashchynski/periodicity"
+  gem.license     = "Apache-2.0"
+end