Added combined javascript to .gitignore. Rake minify now uses configuration for the source directory

.gitignore

@@ -9,6 +9,7 @@ sass.old
 source.old
 source/_stash
 source/stylesheets/screen.css
+source/javascripts/octopress.min.js
 source/images/icon-*.png
 vendor
 node_modules

Rakefile

@@ -61,9 +61,9 @@ task :generate do
 end
 
 Rake::Minify.new(:minify_and_combine) do
-  files = FileList.new("source/javascripts/group/*.*")
+  files = FileList.new("#{source_dir}/javascripts/group/*.*")
 
-  output_file =  "source/javascripts/octopress.min.js"
+  output_file =  "#{source_dir}/javascripts/octopress.min.js"
 
   puts "BEGIN Minifying #{output_file}"
   group(output_file) do