$add, $abs and trigonometry operators ### DSL - Add the `$add` aggregation operator (#7, 4c8eedbe, !33) - Add the `$abs` aggregation operator (#7, 056da623, !35) - Add trigonometry aggregation operators `$cos`, `$cosh`, `$acos`, `$acosh`, `$sin`, `$sinh`, `$asin`, `$asinh`, `$tan`, `$tanh`, `$atan`, `$atanh` (#7, !35) - Move the aggregation conversion functions (`of()`) higher in the `ValueDsl` hierarchy (224c601a, !33) - Rename `ConditionalOperators` to `ConditionalValueOperators` (edf69970, !33) - Rename `SetOperators` to `SetStageOperators` (bc343596, !33) ### Documentation - Add a 'news' section to the website with changelogs (!34) - Add the BSON module in the API reference (!36)