If you don't use opam consult the opam file for build instructions.
Documentation
The documentation and API reference is automatically generated by ocamldoc from the interfaces. It can be consulted online and there is a generated version in the doc directory of the distribution.
Sample programs
If you installed inuit with opam sample programs are located in the directory opam config var inuit:doc.
In the distribution sample programs and tests are located in the test directory of the distribution. They can be built with:
ocamlbuild -use-ocamlfind test/tests.otarget
The resulting binaries are in _build/test.
test.native tests the library, nothing should fail.