Very basic cli to compile ruby files

Off course this is basically a cross compiler and the files
have to be transferred to an arm machine (and fixed as per note)
close #22

bin/rubyxc

@@ -0,0 +1,14 @@
+#! /usr/bin/env ruby -I lib
+require 'rubygems'
+require 'bundler'
+begin
+  Bundler.setup(:default)
+rescue Bundler::BundlerError => e
+  $stderr.puts e.message
+  $stderr.puts "Run `bundle install` to install missing gems"
+  exit e.status_code
+end
+
+require "rubyx/rubyxc"
+
+RubyXC.start(ARGV)