Include all fields if `*' is given to --fields option.

Example:

  $ ./ctags --fields='*'  /tmp/f.el ; tail -1 tags
  f	/tmp/f.el	/^(defun f ()$/;"	kind:function	line:1	language:Lisp
  $ ./ctags --fields='*-lnkK'  /tmp/f.el ; tail -1 tags
  f	/tmp/f.el	/^(defun f ()$/

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Describe '*' optarg for --fields option.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Merge pull request #20 from masatake/all-fields-v1

Include all fields if `*' is given to --fields option(v1)