change cmd parser, add print option
no need to check for Qt3
allow diagram load without gui

In gui mode, diagram will use font setting in gui main
In non-gui mode, it use default font QFont("Helvetica", 12)
allow painting load without gui

same as diagrams
add argument parser
add option support in pdf print
add png support
add svg support, no pdf_tex, eps
add eps file format export
add more details to command line
Merge pull request #60 from Qucs/yodalee-issue32-rebase

Yodalee issue32 rebase