Don't ignore .gems, while searching with ack

ack won't search on specified path if this path is ignored globally
thyme: Don't open Tomato.es window on timer start/end
tmux: Don't update status line every second

Changed to 60 second for energy saving, especially on Mavericks
http://arstechnica.com/apple/2013/06/how-os-x-mavericks-works-its-power-saving-magic/