Openalias ruby wrapper

Openalias.org is great! There is openalias.rs (written in Rust) to
lookup and parse OpenAlias data.
This is a ruby wrapper around that rust library.

I don't know what I am doing so use at your own risk..and with care.

ext/Rakefile

@@ -0,0 +1,5 @@
+require 'thermite/tasks'
+
+project_dir = File.dirname(File.dirname(__FILE__))
+Thermite::Tasks.new(cargo_project_path: project_dir, ruby_project_path: project_dir)
+task default: %w(thermite:build)