add initial version of gemspec file

gobstones.gemspec

@@ -0,0 +1,24 @@
+lib = File.expand_path '../lib/', __FILE__
+$:.unshift lib unless $:.include?(lib)
+
+Gem::Specification.new do |spec|
+  spec.name = 'gobstones'
+  spec.version = '0.0.1'
+  spec.licenses = ['GPLv3']
+  spec.authors = ['Nahuel Garbezza']
+  spec.email = ['[email protected]']
+  spec.homepage = 'http://nahuelgarbezza.com.ar/gobstones-rb/'
+  spec.summary = %q{Ruby implementation of the Gobstones programming language}
+  spec.description = %q{Ruby implementation of the Gobstones programming language}
+
+  spec.required_ruby_version = '>= 1.9.3'
+  spec.required_rubygems_version = '>= 1.3.6'
+
+  spec.add_development_dependency 'rspec', '~> 2'
+
+  spec.files = `git ls-files`.split $/
+  spec.test_files = spec.files.grep %r{^spec/}
+
+  spec.executables = %w(gobstones)
+  spec.require_paths = %w('lib')
+end