Add a default .gitignore for gems
Add a Gemfile for bundler
Add a longer description to README and convert to markdown
Add a version file
Require the version file in mediawiki.rb
Read the version file in .gemspec
Update infos in gemspec
Update paths and file lists in gemspec
Add dependencies to gemspec
Add an rdoc index file
Add a Rakefile with tasks for rdoc, test, console