First GDL packages ready for upload

[Ole Streicher <olebole@debian.org>]

Hi,

I prepared the first three packages that use GDL, and I will upload them
in the next days:

http://anonscm.debian.org/cgit/debian-astro/packages/mpfit.git
http://anonscm.debian.org/cgit/debian-astro/packages/coyote.git
http://anonscm.debian.org/cgit/debian-astro/packages/idlastro.git

I used the following "policy":

* binary packages are prefixes with "gdl-"
* *.pro files install under /usr/share/gnudatalanguage/<package>
* packages require GDL
* no attempt was made to install a common GDL path
* a rudimentary API doc is installed in
  /usr/share/doc/gdl-<package>/html/
* versions contain the date since there are no "releases"
* I made some attempts to make them usable with GDL (build and CI tests)

Since they are the first packages in the GDL ecosystem, I'd like to ask
for a review of the package structure.

Cheers

Ole