lazycat-daemon/: Rename to `lazycat'

* lazycat-daemon/: Rename to `lazycat'.  Move its content to the
  `lazycat/daemon' directory.
* lazycat/Makefile.am: New file.
* configure.ac (AC_CONFIG_FILES): Update.
* Makefile.am (SUBDIRS): Update.
Improve modules hierarchy

* lazycat/daemon/config.scm, lazycat/daemon/curiosity.scm,
  lazycat/daemon/diff.scm, lazycat/daemon/host-list.scm,
  lazycat/daemon/host.scm, lazycat/daemon/lazycatd.scm,
  lazycat/daemon/periodical-ping.scm, lazycat/daemon/proxy-list.scm,
  lazycat/daemon/translator-list.scm: Move to `(lazycat daemon)'
  module.
* lazycat/daemon/lazycat-daemon.c (inner_main): Likewise.
* lazycat/daemon/Makefile.am (lazycat_daemondir): Change
  directory.
* common/translator.scm, trans/apt.scm, trans/portage.scm: Update.