Version 0.9.7.1 corrects two bugs found in version 0.9.7 :
a) a minor bug in the connection routing algorithm
b) a segfault error occuring when printing box expressions with local definitions.
Version 0.9.7.1 also improves the visual appearance of the SVG block-diagrams :
a) block width are now quantized for better visual alignements
b) sequential compositions are now horizontally centered instead of beeing aligned on top line.