[needs-packaging] modglue

Modglue is a C++ library with classes for forking external processes
and asynchronous reading from streams. It takes away the burden of all
subtleties involving the Unix fork call. The asynchronous read
facility enables one to read on multiple input streams at the same
time, without losing any of the standard C++ stream facilities.

URL: http://www.aei.mpg.de/~peekas/modglue/
         (somewhat outdated information)
         http://www.aei.mpg.de/~peekas/cadabra/
         (the main reason why I want modglue packaged)
License: GPL
Notes: This library and the associated tools are generically useful, but
right now the intent to package is mainly to because it is required
for the cadabra program.