* Merge remaining stuff from the nix-make branch.

* Add support for the creation of shared libraries to `compileC',
  `link', and `makeLibrary'.
* Enable the ATerm library to be made into a shared library.

make/examples/trivial/hello.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main(int argc, char * * argv)
+{
+    printf("Hello World\n");
+    return 0;
+}