* Migrated to new API.
* Provided hooks for detecting changes and for adding update/create values.
* Purge dead error detection code (not applying).
* Use global mapping dictionaries stored on class instead of passing arguments down to top and viceversa.
* Number fields computed by a function field instead of being computed by hand.
* Use recordsets as indexes instead of ids to avoid repetitive browses.
[FIX] account_chart_update: Adapted to work with inherited account chart templates.
[FIX] account_chart_update: Remove required=True for chart_template_id on DB and put on screen to avoid error when removing chart templates.
[FIX] account_chart_update: Change method to compare taxes of fiscal positions to match with the one comparing taxes.
[FIX] account_chart_update: Change method to compare accounts of fiscal positions to match with the one comparing accounts.
[IMP] account_chart_update: Wizard now shows in tree view modification notes.
[IMP] account_chart_update: For new data to be created, it is marked on notes the reason for the creation (just for clarity).
[IMP] account_chart_update: Tabs for operations that are not going to be performed are hidden.
[IMP] account_chart_update: Some PEP8 here and there.
[IMP] account_chart_update: Enhance a little the mapping searches (there's more room to improve).
[IMP] account_chart_update: Now it takes into account name and description for mapping taxes.
[FIX] account_chart_update: Corrected some english terms.
[IMP] account_chart_update: Changed name of menu to avoid excessive length.
[IMP] account_chart_update: Removed three line comments style.
[IMP] account_chart_update: Remove class instantiation.
[IMP] account_chart_update: Put method descriptions according documentation standards.
[IMP] account_chart_update: Updated translations.
[FIX]: Changed types to orm.Model, orm.TransientModel and orm.AbstractModel.
[FIX]: Fix deletion method for some fields of objects.
[FIX]: Contributions have been written in the standard format of the community.
[FIX]: Changes in the form to work as a real wizard.
[FIX]: Remove 'init_xml' keys, because it's no longer needed in v7.
[FIX]: Rename 'demo_xml' key to the new standard 'demo'.
[FIX]: Change imports calls.
[FIX]: Remove __author__ variables in files, because authors are put on manifest file (__openerp__.py).
[FIX]: Update view definitions to version 7.0
[FIX]: Rename variables to OpenERP standard.
[FIX]: Increased compatibility with standard PEP8.
