add executable and man page to gem release

foreman.gemspec

@@ -6,4 +6,7 @@ Parka::Specification.new do |gem|
   gem.version  = Foreman::VERSION
   gem.summary  = "Process manager for applications with multiple components"
   gem.homepage = "http://github.com/ddollar/foreman"
+
+  gem.executables  = "foreman"
+  gem.files       << "man/foreman.1"
 end