[FIX] Package: split the version to not include the latest commit's hash included by the package script

setup.nsi: make it build and use postgresql 9.3
win32_se*: lint and simplified
Makefile: only one mode

[ADD] RedHat: defined the dependencies and added a post-install script to create the odoo user, the odoo configuration file, ...

It should not causes any trouble as it is not used in odoo.py

- move packaging stuff to setup
- remove historical stuff
- remove oe, odoo-cmd-fme will be merged with the convered commands
- add an odoo.py script to run odo and boostrap it
- simplify README
- prepare to move documentation to the github wiki