[FYI] Merge branch 'maint' into master

[Stefano Lattarini]

commit e4fc1dad85ab0a6f3f408a2f74059b826457b4dd
Merge: 97d770d 654324c
Author: Stefano Lattarini <address@hidden>
Date:   Thu Jan 3 14:42:55 2013 +0100

    Merge branch 'maint'

    * maint:
      build: don't enable 'color-tests' automake option explicitly
      build: enable all warnings as fatal in our own build system
      texi: Texinfo sources and CLEANFILES definition should co-exist peacefully
      tests: make two new test executable
      runtest: better command line API
      tests: move runtest.in away from the top-lever directory
      maint: move more maintainer files in the 'maint/' subdir
      tests: more significant names for some tests
      maint: add some of my maintainer-specific scripts
      texi: deprecate hack about info files in CLEANFILES variables
      texi: info files can be generated in the builddir