Bundler

Remove the vendored sqlite3-ruby.
Instead, add support for Bundler
(which is vendored).

Before running the new Instiki,
do a 

   ruby bundle

which will install all of the needed gems
locally. (If you need to, tweak the contents
of Gemfile.)

vendor/plugins/bundler/bin/bundle

@@ -0,0 +1,21 @@
+#!/usr/bin/env ruby
+#
+# This file was generated by RubyGems.
+#
+# The application 'bundler' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+require 'rubygems'
+Gem.use_paths File.join(File.dirname(File.dirname(__FILE__))), Gem.path
+Gem.refresh
+
+version = ">= 0"
+
+if ARGV.first =~ /^_(.*)_$/ and Gem::Version.correct? $1 then
+  version = $1
+  ARGV.shift
+end
+
+gem 'bundler', version
+load Gem.bin_path('bundler', 'bundle', version)