allowing the executable to be run without loading the gem, makes it e…

…asier to test.

bin/ruby_diff

@@ -1,8 +1,19 @@
 #!/usr/bin/env ruby
 require 'rubygems'
-require 'ruby_diff'
 require 'optparse' 
 
+# If we're loading ruby_diff directly for development,
+# don't require it through rubygems.  Is there a better
+# way to do this?
+
+if $0 == __FILE__
+  # loaded directly (dev)
+  require File.dirname(__FILE__)+"/../lib/ruby_diff"
+else
+  # loaded via ruby_gems
+  require 'ruby_diff'
+end
+
 @options = {}
 
 feeder_mapping = {