vector graphics footer in gray scale
cleanup of iftex loading
changed page layout to two sided and added additional spacing for footnotes
reduces set of footnote symbols and modified footnote spacing
adjusted font size (and local line spacing) for Helvetica
formatting of enumeration and item lists
new \authorinfo command
fixed \snapshotid command
fixed (added) page number on first page
prevent single lines on bottom of old and top of new page
prevent line column breaking in author info paragraph
improved loading of logo footer
adjusted spacing, color and width of separation hrule
adjusted several spacings
updated todo
updated example