Adding luajit

packages/luajit.rb

+require 'package'
+
+class Luajit < Package
+  description 'LuaJIT is a Just-In-Time Compiler (JIT) for the Lua programming language.'
+  homepage 'http://luajit.org/'
+  version '2.0.5'
+  source_url 'http://luajit.org/download/LuaJIT-2.0.5.tar.gz'
+  source_sha256 '874b1f8297c697821f561f9b73b57ffd419ed8f4278c82e05b48806d30c1e979'
+
+  def self.build
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end