add .gitignore file
Merge pull request #2 from msridhar/add-gitignore

add .gitignore file
Add a top-level test script runalltests.sh

Also, update the individual python test scripts to exit with error
code 1 if any test fails.

Finally, change package.json so that running 'npm test' in the
root directory runs all the tests.
add basic Travis file
trying again with quotes