Merge tag '0.1' into develop

First layout done.
add tikz option to standalone class
add relative dimensions
add better ordering for the class options
simplify the inclusion of images
use better example strings
set sans-serif before
add support for units
add curly litre symbol
use better fonts and sizes
add a new image of a 4 leaf clover
use transparent background for skull
change layout slightly
add technical information about the beer
reposition the elements on the label
flip 4 leaf clover
ignore labels already made
let the example not have any variation
Merge branch 'release/0.2'