Update tables to table-kit view.

Summary: Reskinning tables to table-kit mocks, which includes new textures, spacing, slightly larger fonts. Looking for early feedback before adding in new row colors and other items into the class.

Test Plan: http://phab1.pushlabs.net/uiexample/view/PhabricatorSortTableExample/

Reviewers: btrahan, epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4396