#488 Integrate GNU CAS into Lurch

[Nathan Carter]

Put the GNU CAS Giac into Lurch for the following reasons.

1. We began having trouble (crashes) with our former embedded CAS, REDUCE, and its architecture changed out from under us so that what we had been using was no longer supported.
2. Giac (the CAS in the GNU project) comes ready-made to integrate into a Qt project. (We had been doing that effort for REDUCE ourselves.) The source download ready to embed into a Qt project is here.
   The API documentation is here.

[Nathan Carter]

• Description has changed:

Diff:

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+++ new
@@ -1,4 +1,5 @@
 Put the GNU CAS Giac into Lurch for the following reasons.

- 1. We began having trouble (crashes) with our former embedded CAS, REDUCE, and its architecture changed out from under us so that what we had been using was no longer supported.
- 1. Giac (the CAS in the GNU project) comes ready-made to integrate into a Qt project.  (We had been doing that effort for REDUCE ourselves.)  The source download ready to embed into a Qt project is [http://www-fourier.ujf-grenoble.fr/~parisse/giac_compile.html here].
-The API documentation is [http://www-fourier.ujf-grenoble.fr/~parisse/giac_us.html#Giac here].
+
+1. We began having trouble (crashes) with our former embedded CAS, REDUCE, and its architecture changed out from under us so that what we had been using was no longer supported.
+1. Giac (the CAS in the GNU project) comes ready-made to integrate into a Qt project.  (We had been doing that effort for REDUCE ourselves.)  The source download ready to embed into a Qt project is [here](http://www-fourier.ujf-grenoble.fr/~parisse/giac_compile.html).
+The API documentation is [here](http://www-fourier.ujf-grenoble.fr/~parisse/giac_us.html#Giac).

[Nathan Carter]

Worked on this a bit today. qtgiac doesn't compile on my machine, so I emailed the author (?...at least, the person whose website contains the code) and asked if he had an updated version that compiles with the latest Qt and clang.