[COMMIT] Bumping version to v0.0.3

[COMMIT] Bumping version to v0.0.3

1. Minor changes to demos
2. Adding test files for thread, process, cluster
3. Bumping version to v0.0.3.

Pre Release: [COMMIT] [concurrency.js] [bug] [version] V0.0.3-beta

[COMMIT] [concurrency.js] [bug] [version] V0.0.3-beta

1. Bumping version to 0.0.3-beta.
2. Adding demos.
3. Minor bug Fixes with threads, thread.async functions.
4. Adding threads.async function.
5. [TODO] Tests for cluster, threads, threads.async, process