testing w/ travis ci

Add .travis-yml
octsympy_test_suite: better test driver, for travis for example
stop doing private tests

https://savannah.gnu.org/bugs/?38776
sympref: clean-up test output a little
no one is watching the watchers

add a trivial test to keep this script off the "no tests" list
placeholder for private tests

in case we every get that working
Merge pull request #92 from cbm755/travis_test

Add Travis CI, fix up tests a bit so they automate better