HOT RELOADING DEMO

This is a simple demo of hot code reloading in C on Linux. Internally,
it uses the POSIX dlopen() family of functions for dynamic loading and
the Linux inotify API for watching the filesystem.

To build, run the build.sh script.  When running the demo, you must
specify the build directory in LD_LIBRARY_PATH:

	  LD_LIBRARY_PATH=build build/demo

The demo will repeatedly print out the message returned by getmsg(),
defined in mod.c -- if getmsg() is modified to return a different
message and recompiled, the change will be loaded in running program.