Fix up doxygen

[bringhurst]

Get doxygen working with all utilities.

[adammoody]

This is a good idea. Do you have a good reference link for doxygen syntax?

[bringhurst]

http://www.doxygen.org/ is probably the primary place.

There are 2 basic styles, C++ and Java.

Java is way more popular, even for C code.

Take a look at libcircle for a half-assed attempt at using the Java-style doxygen. :)

https://github.com/hpc/libcircle/blob/master/doc/Doxyfile.in