Clickable URLs for the 19 earlier reproducibility solutions

In this commit, the URLs for the 19 "earlier solutions" at the
beginning of "3 Principles" are recovered from
tex/src/paper-long.tex and put behind the package names
as clickable words.

To reduce the chance that these are interpreted as references,
"Project1 (yyy1), Project2 (yyy1)" is changed to "yyy1: Project1,
Project2". We cannot add full references because of the 8000-word
space constraint.

With a minor word improvement, this commit overall reduces the word
count very slightly, by 9, according to

pdftotext paper.pdf |wc paper.txt

before and after the commit.

0 files changed, 0 insertions, 0 deletions