Finally updated ><

Removed read.class, its now implemented in Coloring.class
Changed convert.class to Units.class (so that know it is converting
Unit, instead of general term)
Modified implementations of methods in Units.class, Drawings.class,
Lines.class, Shapes.class (Not very nice yet for Drawings.class
readAttributes(Element, String))
Uncomment few lines in SVGReader.class and lineText.SVG for testing
purposes