attach: bem-structure refactoring
attach: continue refactoring
attach: refactoring of bem-structure + js
attach.js: refactoring
attach: add some tests
attach.js: refactoring
input.js: add html escaping for filename
attach: add some tests
attach: add some testcases
attach: add support for "disabled" mod
attach: button should have focused mod
attach: add "focused" mod
Merge pull request #168 from bem/issues/157@v2

attach: refactoring