Changed threads table view to new design

Added all the functionallity and markup that makes the new threads list view design.
Including filtration by keyword, partial updates of the DOM, different sections
for selected and unselected threads and checkboxes.
fixed wrong checkbox status
Implemented new layout for threads tab

Implemented the new layout for the threads tab.
Merge pull request #69 from dzautner/implement-new-threads-design

Implement new threads design