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.

- [x] Create an adequate db:seed with projects, users and everything.
- [x] Create initial instructions to setup Neighbor.ly's code.
- [x] Move db:seed:development to db:seed
- [x] Create db:seed:production with only necessary data to run Neighbor.ly