AqFinance

Added modules for XML import and export of database.

With these modules it is now possible to dump a database to an XML
file (e.g. for backup purposes) and to read it back later.

This will also make it easier to provide a basic setup with currencies
and accounts.

Started working on a business module. Use new icons.

Work on build system.

Removed autogenerated files; sources are now created when necessary using
typemaker2. Removed unneeded files.

Added handling for account balances, removed category handling.

Removed PlaceHolder account type, added flag for that purpose.

Much more work.

- removed commodity handling (we now only handle currencies)
- removed FF_ManageCommodities
- improved account type handling in FF_EditAccount
- improved FF_EditBankAccount (use AqBanking to check accounts)
- improved FF_EditPartner (added check boxes for customer and vendor)...

Added handling of items and item templates.

Use these items in AE_EditJob. This makes writing invoices much faster.
- AE_ADDRESS now uses a common field for street and house number
- added flags for billing and delivery to AE_ADDRESS
- added FF_EditItems...

Fixed a typo.

More work on some dialogs.

- FF_EditGroup now reads/writes its geometry
- fixed a bug in FF_EditPartner (was not setting opts)
- added dialog FF_EditTax
- FM_PartnerPage: ask PartnerView wether it is currently editing. If so
then we must not answer to the dbReload signal because that might remove...

Added Taxes (including dialogs and widgets).

An editor still needs to be written.
- added dueDate to AE_JOB

Transformed many classes to typemaker2 classes.

This transformation makes it easier to add fields to objects. It also makes
sure that all stuff which is written can be read back.

- AE_ACCOUNT
- AE_ADDRESS
- AE_BANKACCOUNT
- AE_PARTNER
- AE_RULE