Simplify Burau::Table::Base#initialize
Fix #2 - Support Ruby 1.8.7

Wrap attributes in ordered hash.

More: https://github.com/neopoly/bureau/issues/2
Ref #2 - Hotfix to ensure correct attribute order on Ruby 1.8.7 in test.
Ref #3 - More generic renderer. Renderer can apply features.

Remove feature dock to top for the moment.
Implement new features docked.

First row is docked at top of the table.
Add *.swp to .gitignore.