Fix Guile modules loading errors on some systems.

* autoconf.ac: Fix Guile modules check error on some
systems. Remove unnecesary checks for Guile modules.
* ui/lazycat-gtk.scm: Change the interpreter to the
guile-gnome-2.
* .gitignore: Ignore binary files and scripts.
* Makefile.in, aclocal.m4, configure: Update.