Add Keyboard and Mouse Support

New Features for controlling the log using the keyboard and mouse.

1. [Spacebar] play/pause log.
2. [Left], [Right] now scroll log back and forwards.
3. [Shift][Left], [Shift][Right] Zoom
4. [Alt][Left], [Alt][Right] Zoom faster
5. [PgUp], [PgDn] Goto start/end off log

For the Mousewheel,

1. [WheelUp], [WheelDn] move back wards and forwards through log.
2. [Shift][WheelUp], [Shift][WheelDn] Zoom
3. [Alt][WheelUp], [Alt][WheelDn] Zoom faster

Hope this helps....