list of possible directives which will be replaced
by the appropriate values or will create bars or
icons extracted from
http://lcd4linux.sourceforge.net/manual.html 

Directive				Description
===================================================================================
\nnn					will write the ASCII-character nnn (octal)
%token					will be replaced by the value of token
					for a detailed description of every
					possible token please refer to
					http://lcd4linux.sourceforge.net/manual.html or
					/usr/share/doc/packages/lcd4linux/README.Tokens
%%					will write a '%'
%$					will write a '$'
%&					will write a '&'
$<direction><length><token>[+<token>]	will create a bar with the specified
					direction and length (in characters)
					with the value of token. If the driver
					supports dual bars, you can specify the
					second value with '+token'. 'direction' can
					be 'l' (left), 'r' (right), 'u' (up) or
					'd'(down). If you specify the direction
					in upper case, a logarithmic bar will be
					created. The space occupied by a bar
					always grows from left to right or from
					top to bottom, regardless of the direction!
$t<height><token>,<width>		will create a time series bar. The data
					is displayed like '$u', but shifted every
					second 1 pixel to the left. Currently only
					displays based on the pixel-driver support
					these type of bars.
&<num>					will draw the icon 'num' at this position