Adding functionality for fetching code from github

hack for 1.8.7

Don't miss test_markup's relative require

need some food now

test/wiki_factory.rb

@@ -0,0 +1,10 @@
+class WikiFactory
+  def self.create p
+    path = testpath "examples/test.git"
+    Grit::Repo.init_bare(path)
+    Gollum::Wiki.default_options = {:universal_toc => false}
+    cleanup = lambda { FileUtils.rm_r File.join(File.dirname(__FILE__), *%w[examples test.git]) }
+    wiki = Gollum::Wiki.new(path)
+    return wiki, path, cleanup
+  end
+end