Only reveal/flip voted clients. Ref #26
Fix cookie expiration value. Ref #24
Add jquery.hotkeys.js. Ref #19
Enable 'space' to reveal and 'esc' to reset
Use enter/return instead of space (conflicts with native page-down). Ref #19
Patch increment
Merge dev -> master 1.5.2: Close #19 Keyboard shorttcut. Close #26 no-unvoted reveal. Close #24 cookie timing.