* Improved escaping in IIRC script
   - \b, \u, \k and \e will be replaced with its control code characters
(bold, underline, color and reset).
   - \n will escape a newline.
 * New script functions:
   - $Width(#channel[, l)
     - $Width(@window)
   - $Height(#channel[, l]
     - $Height(@window)
     Return height|width of channel/window textbox (or listbox)
   - $Active
     Return current window active
 * New events:
   - Activate(%window) - Runs when another window is activated
   - Deactivate(%window) - Runs when current window is no longer the
active
    These events essentially runs when switching between windows.
    First the Deactivate event runs for window you switch _from_
    and then Activate runs for the window you switch _to_.
 * Fixed crash on using $Listbox in a window without listbox
 * Variable merging didn't work properly on VAR, DEL, INC and DEC
instructions.
 * Fixed backround colors on text
 * Fixed empty text copying