DESCRIPTION
v.parallel creates parallel lines to the input vector lines which
can be used as half-buffers.
NOTES
Usage of -b flag will overrule the side parameter.
KNOWN ISSUES
There is a problem with side-offset parallel line generation for inside corners.
To avoid this problem, the -b flag might be used.
SEE ALSO
v.buffer
AUTHORS
Radim Blazek
Rewritten by Rosen Matev (with support through the Google Summer of Code program 2008)