Added test.sh to run some tests on the tools.
Added some tests to the test script.
Added some comments.
Added comment on test.sh
Added test target on makefile that runs ./test.sh
Simplified assert. Added more sgetopt tests.
added assert_evl and tests to randpar
Corrected test.
Added fit_test on test.sh.
sgetopt now receives an extra parameter.

The new option is the array to receive nonoptional arguments (simpler
way of setting it).
all now a prerequisite to test on Makefile.
Added stop_at_nonoption on sgetopt.

This makes sgetopt stop at the first non optional argument.
untl / whle now processing --version and --help
untl now accepting interval length (in seconds).