Changed a few remaining blank indentations to tabs. Changed use of double quotes in js to single quotes.
Hide, not disable, the Completed Todos button when there are no completed todos.
Added a copy of the todomvc app specification, modified for marking up items as DONE, NOT APPLICABLE, or TODO. Grep this file on TODO to see current status of effort.
Removed line wrapping on TODO items in spec file, so grep will display entire TODO.
Improved several spec todos.