* autoconf, add rules for generated files (use AUTOCONF_GENERATED_FILES for this)
* Makefile.in: mark makefoo.pc as generated
* GENERATED_FILES introduced
* autoconf: AUTOCONF_GENERATED_FILES are added to GENERATED_FILES
* install revamped, so it supports generated files
* simple_autoconf_oos_build_test now tests for bin,lib,files and scripts installation