configure Travis CI services

run test/support/createdb.js before testing

drop devDependencies from package.json

Fix developmentseed/node-sqlite3#169

Drop step@0.0.4 from devDependencies

Extend the timeout

Currently the `devDependencies` value in `package.json` lists `"step": "0.0.4"`, but it does not seem that the `step` module is used anywhere.

`test/parallel_insert.test.js` took 134383ms on 2.2GHz single-core Pentium 4 in Windows XP

another try at fixing  build order based on details at https://code.google.com/p/gyp/issues/detail?id=259

Make tar.gz a bundled dependency

Don't bother unpacking sqlite if we're not using it

Move some protected methods to public

Avoid writing to freed memory

Make sure the INSERT completes before trying the SELECT