Improve development environment

As @Irio said on #18, we don't have a good instructions, also we don't even have  automated scripts to start the development without a copy of production database.

- [ ] Create a adequate db:seed with projects, users and everything.
- [ ] List all rake talks that helps the development.
- [ ] Create instruction to setup the Neighbor.ly.
- [ ] Migrate the current staging to have only fake data.