Getting some more things out

Another weeks worth of work

- Bump Flow version to 0.1.4

- [Flow] Unbreak the open source build
- [PR facebook#200] from fmahnke/node_http_interface
- [PR facebook#203] from rsolomo/node-net-isip
- [PR facebook#201] from unknownexception/patch-1
- [Flow] Fill out Map definition
- try-catch
- missing annotation errors for type aliases
- Type refinement fixes for early return

Merge pull request facebook#203 from rsolomo/node-net-isip

add declarations for net.isIP*