BUGFIX: do not enable DC guessing if not requested or conf.
Allow running more tests in the same dir, add IOError .ini not found.
TEST: add new mos models tests.
TEST: remove plot.
TEST: relax colpitts test req.
MISC: Show -i option in help.
Test for running directory.
DOC: initial doc effort.
Fix the square law mos model.
TEST: Add tests for the SL mos model.