Update aggregation reference documentation.

See #4139
Original pull request: #4182.

Author: christophstrobl

Diff for: src/main/asciidoc/reference/aggregation-framework.adoc

@@ -82,7 +82,7 @@ At the time of this writing, we provide support for the following Aggregation Op
 | `setEquals`, `setIntersection`, `setUnion`, `setDifference`, `setIsSubset`, `anyElementTrue`, `allElementsTrue`
 
 | Group/Accumulator Aggregation Operators
-| `addToSet`, `bottom`, `bottomN`, `covariancePop`, `covarianceSamp`, `expMovingAvg`, `first`, `last`, `max`, `min`, `avg`, `push`, `sum`, `count` (+++*+++), `stdDevPop`, `stdDevSamp`
+| `addToSet`, `bottom`, `bottomN`, `covariancePop`, `covarianceSamp`, `expMovingAvg`, `first`, `firstN`, `last`, `lastN` `max`, `maxN`, `min`, `minN`, `avg`, `push`, `sum`, `top`, `topN`, `count` (+++*+++), `stdDevPop`, `stdDevSamp`
 
 | Arithmetic Aggregation Operators
 | `abs`, `acos`, `acosh`, `add` (+++*+++ via `plus`), `asin`, `asin`, `atan`, `atan2`, `atanh`, `ceil`, `cos`, `cosh`, `derivative`, `divide`, `exp`, `floor`, `integral`, `ln`, `log`, `log10`, `mod`, `multiply`, `pow`, `round`, `sqrt`, `subtract` (+++*+++ via `minus`), `sin`, `sinh`, `tan`, `tanh`, `trunc`
@@ -94,13 +94,13 @@ At the time of this writing, we provide support for the following Aggregation Op
 | `eq` (+++*+++ via `is`), `gt`, `gte`, `lt`, `lte`, `ne`
 
 | Array Aggregation Operators
-| `arrayElementAt`, `arrayToObject`, `concatArrays`, `filter`, `first`, `in`, `indexOfArray`, `isArray`, `last`, range`, `reverseArray`, `reduce`, `size`, `slice`, `zip`
+| `arrayElementAt`, `arrayToObject`, `concatArrays`, `filter`, `first`, `in`, `indexOfArray`, `isArray`, `last`, range`, `reverseArray`, `reduce`, `size`, `sortArray`, `slice`, `zip`
 
 | Literal Operators
 | `literal`
 
 | Date Aggregation Operators
-| `dayOfYear`, `dayOfMonth`, `dayOfWeek`, `year`, `month`, `week`, `hour`, `minute`, `second`, `millisecond`, `dateAdd`, `dateDiff`, `dateToString`, `dateFromString`, `dateFromParts`, `dateToParts`, `isoDayOfWeek`, `isoWeek`, `isoWeekYear`
+| `dateSubstract`, `dateTrunc`, `dayOfYear`, `dayOfMonth`, `dayOfWeek`, `year`, `month`, `week`, `hour`, `minute`, `second`, `millisecond`, `dateAdd`, `dateDiff`, `dateToString`, `dateFromString`, `dateFromParts`, `dateToParts`, `isoDayOfWeek`, `isoWeek`, `isoWeekYear`, `tsIncrement`, `tsSecond`
 
 | Variable Operators
 | `map`
@@ -115,7 +115,7 @@ At the time of this writing, we provide support for the following Aggregation Op
 | `convert`, `degreesToRadians`, `toBool`, `toDate`, `toDecimal`, `toDouble`, `toInt`, `toLong`, `toObjectId`, `toString`
 
 | Object Aggregation Operators
-| `objectToArray`, `mergeObjects`
+| `objectToArray`, `mergeObjects`, `getField`, `setField`
 
 | Script Aggregation Operators
 | `function`, `accumulator`