rename examples dir to ``examples``

def fix_examples_dir(lib_dir):
    """rename examples dir to ``examples``"""
    for x in lib_dir.dirs():
        if x.name.lower() == EXAMPLES:
            return
    for x in lib_dir.dirs():
        if x.name.lower() == EXAMPLES:
            _fix_dir(x)
            return
    for x in lib_dir.dirs():
        if 'example' in x.name.lower():
            _fix_dir(x)
            return
    for x in lib_dir.dirs():
        if len(files_multi_pattern(x, INO_PATTERNS)):
            _fix_dir(x)
            return