feat #1128 update gitignore/npmignore

1. It seemed that os-bootstrap/ and os-production/ rules were not needed anymore, but the contents of those folders were pushed to npm with 1.5.3 so it's better to keep them forever.
2. *.tgz to ignore the files created with `npm pack` while testing
3. src/aria/jsunit/robot* as a temporary workaround for the issue to make test/test.htm work with robot test cases