Log message:
Point to new project universal-ctags

Log message:
Add m4.ctags file for new optlib parser

Log message:
Import ctags-5.8nb20150427 as wip/ctags-git.

Exuberant Ctags generates an index (or tag) file of source language
objects in source files that allows these items to be quickly and
easily located by a text editor or other utility.

Alternatively, it can generate a cross reference file which lists,
in human-readable form, information about the various objects found
in a set of source code files.

Supported languages include: Ada, Assembler, ASP, Awk, C, C++, Clojure, CSS,
BETA, COBOL, D, Eiffel, Falcon, Fortran, Go, Java, Json, Lisp, Make, Pascal,
Perl, PHP, Python, REXX, Ruby, Rust, Scheme, Shell scripts (Bourne/Korn/Z),
S-Lang, Tcl, Vim and YACC/Bison.