Planned features for 0.5:
-------------------------
+ configurable XSL preselections for ledger XML export
+ don't show/calc value change for 1st month on assets/liabs
+ cleanup after annual financial report:
  - introduce new account types "own capital" and "P&L"
  - delete journal
  - book balances of all assets/liabilities as initial values against own
    capital
+ db: shortint -> int
+ don't restrict on two decimals in XML files

Planned features for future versions:
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+ templates for booking patterns
