Line A support

This contribution adds Line A support to libcmini in case you do not have MiNTLib installed. It is nothing but a recent copy from MiNTLib.

Usage

To add these functions and the include file to your libcmini, simply follow these steps:

1. Enter your libcmini directory.
2. Copy linea.c and linea.h to the libcmini source:
   $ make -C contrib/linea install
3. Compile and install libcmini:
   $ make all install
   (or whatever you run to compile and install)
4. Remove linea.c and linea.h from the libcmini source:
   $ make -C contrib/linea uninstall