[sql]replace . with _ in file name to avoid problem when loaddata
[README]make the database setup process more clear

1. list postgresSQL as prerequisites
2. make it clear that database and role should be created before syncdb
3. use 'python manage.py syncdb --migreate' to set up database
4. use the new name of dumped data
[README]fix the layout
[README] fix typo and broken link
[README] fix link reference
Merge branch 'master' of https://github.com/Feng-Gao/brand-manager
Adding the dump for 2013.11.21
Merge branch 'master' of https://github.com/okfn/brand-manager