[MERGE] refactor as much as possible the code to generate the chart of accounts,...

[MERGE] refactor as much as possible the code to generate the chart of accounts, journals, taxes, chart of taxes... from templates because currently the code:
 - exists in account/installer.py  (if you select the generic chart of account)
 - exists in account/account.py (if you select a l10n_** module and then run the second wizard.

so, i think that we need to make a common function that will be call in both cases. The generic chart of account should be defined as a l10n_** module (with same objects (templates..)

bzr revid: mra@mra-laptop-20110210091102-xlaj9sgv6ugk169n