Deprecated libraries removed

I had some Common Lisp libraries on Github that I have abandonned a while ago, mostly because I have either

1. found a better library by someone else,
2. decided to follow alternative approaches, or
3. write a better version with an incompatible API.

These libraries have been undergoing some quiet bit-rot for a while which makes them unusable without minor or not so minor fixes, for which I have no time; also, there are better libraries out there for the same purpose.

Having abandonned Common Lisp libraries out there is confusing and goes against the principle of consolidating Common Lisp Libraries, so I decided to remove some repositories. In particular, I have removed

1. cl-2d, which didn't see any new development in the last two years. My recommended replacement is cl-flexplot, which uses PGF (a LaTeX package) as a backend.
2. cl-text-tables was simply abandonned, I recommend the excellent cl-csv instead.
3. cl-numlib is superseded by cl-num-utils.

The latter two suggested replacements are in Quicklisp.

If, for some strange reason, anyone is interested in the code of the dead libraries, just write me an e-mail. But I would prefer if these libraries stayed dead, as there are much better replacements out there.

It is very likely that I will remove other deprecated libraries in the future.

cl-numlib, array-operations and cl-colors migrated to Github; my packages are asdf-installable again

Looks like I goofed up when releasing cl-2d: it used a few routines which were sitting on my hard disk but not made public yet. I think I corrected that, and pushed the new versions to Github. Also, I think I figured out how to link to tarballs on Github. Using entries like

:(package "http://github.com/tpapp/cl-2d/tarball/master")

ASDF goes to Github, where is it redirected to the latest master tarball, and appears to work fine. If not, let me know and it will be fixed. Still, I would suggest that you use git to keep updating the libraries if you can. Thanks to Peter Mikula for reporting the missing library code.