updates to Common Lisp libraries

In the past month I updated many of my Common Lisp libraries. Here is a brief summary of the changes:

1. cl-num-utils has been growing by accretion for a long time, which did not lead to the cleanest code. I decided to reorganize the library and split off functionally independent parts which may be useful on their own:
   • functions that operate on Common Lisp arrays have been moved to array-operations,
   • functions that handle array slices are now in cl-slice,
   • data frames are in cl-data-frame (which is still experimental, but works fine).

   The first two are meant to have very few dependencies, and in particular do not depend on cl-num-utils. I hope that cl-slice will serve as a basis for a Common Lisp API for slicing arrays and array-like objects.

   Parts of cl-num-utils have been disabled for now because I didn't have time to update their unit tests and I don't like to release untested code. If you need any of those, please open an issue on Github.

2. lla had to be rewritten a bit since it depends on cl-num-utils. I moved special matrices from the former to the latter since they do not require foreign functions per se, and moved array stacking code to array-operations.
3. cl-random also depends on cl-num-utils and had to be rewritten a bit. Again, not all functionality is enabled yet, feel free to open an issue if you need something urgently. I will re-enable everything in due time, but I would like to think more about testing multivariate distributions.
4. Minor changes were made to cl-rmath and let-plus.

array-operations resurrected

After reading a few papers on array languages, I decided to resurrect my array-operations library. Nope, this does not make Common Lisp into APL or Nial, but it does provide a concise DSL for array operations which should integrate well into Common Lisp.

The github page provides a quick tour of the library. The code is (or should be) portable, ANSI-conformant Common Lisp, and comes with unit tests for all functions.

The library previously available under this name (which has been dormant for 3 years) is still available, but it is deprecated.

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.