After downloading Tar.Gz package, run:
$ ./configure ; make && make install
Running autogen.sh might help in case of unexpected configure problems (or if
configure script doesn't exist – e.g. when you download from GIT repository).
To include Keyvis, add --with-keyvis option to configure. It will use Ant to
build NetBeans project. You will need jars (see README) and Java developer
tools (JDK). You can also download a binary Keyvis package (it's in Java, so
binary shouldn't cause any problems).