- Fix regression with expression evaluation by reverting commit
  `Correction to the way parens are parsed in query expressions` (bug #1894)

- Fix --invert breakage by reverting commit `Change --invert to invert
  displayed amounts and totals, not amounts` (bug #1895)

- Fix performance regression by reverting commit `Compare price
  annotations using their textual rendering` (bug #1907)

- Fix library path issue (bug #1885)

- Allow specifying the Python version (bug #1893)

- Some documentation fixes