Update version to 1.0.0?

Rationale: due to the way npm's [caret ranges](https://docs.npmjs.com/misc/semver#caret-ranges-1-2-3-0-2-5-0-0-4) work it is not easy to update `launchpad` in projects using it.

E.g. `wct-local` has `launchpad` as its dependency with version defined as `^0.4.4.`. So in order to update `launchpad` to `0.5.0` (latest release as of Oct 23, 2015) one needs to update deps on `wct-local` manually.

Alternative solution: re-release `0.5.0` as `0.4.10` though personally I'd prefer the `1.0.0` as `launchpad` seems to be production ready.

The issue names no files, tests, or entry points. Start by reading the linked npm caret-range documentation and comparing the proposed 1.0.0 release with the alternative 0.4.10 approach; done means reaching and documenting a versioning decision that addresses the wct-local dependency update problem.

Written by the indexing model from the issue text.