Alter to use brianmario's "mysql2", "~> 0.3.7", :ref => "d3a96b8"

Gemfile
- Alter to use
    gem "mysql2", "~> 0.3.7"
      , :git => "git://github.com/brianmario/mysql2.git"
      , :ref => "d3a96b8"
  accroding to https://github.com/brianmario/mysql2/issues/216.
Add substantial .vimrc instead of empty symbolic link

.vimrc
- Add substantial body instead of empty symbolic link.
Remove codes to cause errors in migration from scratch

db/migrate/20100115234855_remove_column_order_number_from_players.rb
- Remove "remove_index  :players, [:team_id, :order_number]".
db/migrate/20100116133545_add_nation_id_to_team.rb
- Remove the codes to set nation_id to 'England'.
db/migrate/20100512140904_create_season_series.rb
- Remove the codes to create initial records.
Fix Player.list() to nil-check Player#order_number() when sorting

app/models/player.rb
- Fix self.list() to nil-check Player#order_number() when sorting.
Add scripts and configs to start/stop the server

config/unicorn-config.rb
- Alter to use an external file for a port to listen.
config/unicorn_env
config/unicorn_port
script/fifa10d.sh
script/unicorn.sh
- Newly created.
Remove config/{unicorn_env,unicorn_port,unicorn_user}

.gitignore
- Add config/unicorn_* to ignore.
config/unicorn_env
config/unicorn_port
config/unicorn_user
- Remove from the repository.
DB backup since long before