Added more information to the README file.

README.md

@@ -1,4 +1,34 @@
 futility
-======
+========
 
-A collection of Fortran 95/03/08 utilities.
+A collection of modern Fortran utilities. So far it includes some numerical
+subroutine and a module for simplified input and output of arrays. In future
+I hope to add various data structures, some useful functions for interacting
+with the system (adding, removing files, etc.), and an object-oriented plotting
+system.
+
+Compiling
+---------
+
+futility uses [FoBiS](https://github.com/szaghi/FoBiS) for its build system.
+This provides a simpler interface to work with than Makefiles. To compile,
+simply execute
+
+	./FoBiS.py build
+
+and this will produce a shared-object file and place all module files in the
+directory ``mod/``. If you want to recompile the documentation then type
+
+	./FoBiS.py rule -ex makedoc
+
+futility is known to compile with gfortran 4.8.2 on a 64 bit laptop running
+Linux Mint Debian Edition. How it will behave anywhere else is not subject to
+any guarantees.
+
+
+Documentation
+-------------
+
+Extensive documentation of the various modules and procedures in Futility can
+be found in the ``doc/`` directory. The library can be linked to your Fortran
+programs in the usual way.