Log Message:
Update to 3.14.0:

    version 3.14.0

    macros2: Update links to macros in the autoconf-archive

    Now that the macros have been committed upstream, we can link to their
    manual pages rather than the bug reports.

    macros2: Add support for APPSTREAM_XML macro

    And request that appstream-xml.m4 get installed if missing.

    https://bugzilla.gnome.org/show_bug.cgi?id=736497

    macros2: Deprecate GNOME_CODE_COVERAGE

    The autoconf-archive AX_CODE_COVERAGE macro should be used instead.

    https://bugzilla.gnome.org/show_bug.cgi?id=729405

    macros2: Deprecate GNOME_MAINTAINER_MODE_DEFINES

    The modules which it deprecates are all ancient and unused. Many of the
    modules which use GNOME_MAINTAINER_MODE_DEFINES don’t make use of the
    DISABLE_DEPRECATED variable it generates anyway.

    If a module really wants maintainer mode, they should use
    AM_MAINTAINER_MODE. Otherwise, they should just eliminate this call
    entirely.

    https://bugzilla.gnome.org/show_bug.cgi?id=735417

    macros2: Deprecate GNOME_DEBUG_CHECK

    The autoconf-archive AX_DEBUG_CHECK macro should be used instead, or the
    macro contents should just be substituted into configure.ac directly,
    since it’s so simple.

    https://bugzilla.gnome.org/show_bug.cgi?id=729403

    build: Remove a non-existent file from EXTRA_DIST

    https://bugzilla.gnome.org/show_bug.cgi?id=735418

    compiler-flags: allow suppressing warnings

    Some projects want to see no warnings at all, for example, projects that
    are written in Vala. But GNOME_COMPILE_WARNINGS([no]) is a no-op that
    does nothing to turn off the default compiler warnings. Presumably if
    you ask for no compiler warnings, you want no compiler warnings, so
    suppress them in this case instead.

    https://bugzilla.gnome.org/show_bug.cgi?id=734973

    code-coverage: Support lcov 1.11

    https://bugzilla.gnome.org/show_bug.cgi?id=732988

    macros2: Remove FORBIDDEN_M4MACROS infrastructure

    It was completely outdated and unused. The REQUIRED_M4MACROS
    infrastructure is, however, still in use.

    https://bugzilla.gnome.org/show_bug.cgi?id=729932

    macros2: Remove outdated README file

    https://bugzilla.gnome.org/show_bug.cgi?id=729410

    doc: Move doc/usage.txt to README and update

    We don’t like references to CVS any more. Update the guidelines to no
    longer reference GNOME_COMMON_INIT.

    https://bugzilla.gnome.org/show_bug.cgi?id=729410

    make program_VERSION a local variable

    Otherwise we may end up overriding what was manually set in the
    environment.