add info to makefile

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add .phony

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add fdl texinfo

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add basic info doc

Signed-off-by: Mattias Andrée <maandree@operamail.com>