Create INSTALL file using Pandoc
Replace using lynx with using pandoc. Pandoc creates better looking
output and it avoids the delicate locale/encoding issues of lynx because
it always uses UTF-8 for both input and output.
Note: requires Pandoc >=1.13
Discussion: https://www.postgresql.org/message-id/flat/
dcfaa74d-8037-bb32-f9e0-
3fea7ccf4551@2ndquadrant.com/
Reviewed-by: Mi Tar <mmitar@gmail.com>