Manually bootstrap JRuby after all.

After discussing this with @headius I've decided to do this the manual way
anyway. Apparently the basic load service stuff is deprecated and not very
reliable.

ext/java/Liboga.java

@@ -0,0 +1,14 @@
+package org.liboga;
+
+import org.jruby.Ruby;
+
+public class Liboga
+{
+    /**
+     * Bootstraps the JRuby extension.
+     */
+    public static void load(final Ruby runtime)
+    {
+        org.liboga.xml.Lexer.load(runtime);
+    }
+}

ext/java/LibogaService.java

@@ -1,31 +0,0 @@
-import java.io.IOException;
-
-import org.jruby.Ruby;
-import org.jruby.RubyModule;
-import org.jruby.RubyClass;
-import org.jruby.runtime.load.BasicLibraryService;
-import org.jruby.runtime.load.Library;
-
-public class LibogaService implements BasicLibraryService
-{
-    /**
-     * Bootstraps the JRuby extension.
-     *
-     * In order to load this extension properly you have to make sure that the
-     * lib/ directory is in the Ruby load path. If this is the case you can
-     * load it as following:
-     *
-     *     require 'liboga'
-     *
-     * Using absolute paths (e.g. with `require_relative`) requires you to
-     * manually call this method:
-     *
-     *     LibogaService.new.basicLoad(JRuby.runtime)
-     */
-    public boolean basicLoad(final Ruby runtime) throws IOException
-    {
-        org.liboga.xml.Lexer.load(runtime);
-
-        return true;
-    }
-}

lib/oga.rb

@@ -6,14 +6,11 @@ require_relative 'oga/xml/lexer'
 require_relative 'oga/xml/parser'
 require_relative 'oga/xml/pull_parser'
 
-# JRuby is dumb as a brick and can only load .jar files using require() when
-# ./lib is in the LOAD_PATH. require_relative, or any other form that uses
-# absolute paths, does not work.
-unless $:.include?(File.expand_path('../', __FILE__))
-  $:.unshift(File.expand_path('../', __FILE__))
-end
+require_relative 'liboga'
 
-require 'liboga'
+if RUBY_PLATFORM == 'java'
+  org.liboga.Liboga.load(JRuby.runtime)
+end
 
 require_relative 'oga/xml/node'
 require_relative 'oga/xml/element'