message: docs(changelog): add changelog for 2.4.4
diff: +<a name="2.4.4"></a>
  +## [2.4.4](https://github.com/angular/angular/compare/2.4.3...2.4.4) (2017-01-19)
  +
  +* **animations:** fix internal jscompiler issue and AOT quoting ([#13798](https://github.com/angular/angular/issues/13798)) ([261fd16](https://github.com/angular/angular/commit/261fd16))
  +* **common:** support numeric value as discrete cases for NgPlural ([#13876](https://github.com/angular/angular/issues/13876)) ([3d0b1b8](https://github.com/angular/angular/commit/3d0b1b8))
  +* **http:** don't create a blob out of ArrayBuffer when type is application/octet-stream ([#13992](https://github.com/angular/angular/issues/13992)) ([015878a](https://github.com/angular/angular/commit/015878a)), closes [#13973](https://github.com/angular/angular/issues/13973)
  +* **router:** enable loadChildren with function in aot ([#13909](https://github.com/angular/angular/issues/13909)) ([2af5862](https://github.com/angular/angular/commit/2af5862)), closes [#11075](https://github.com/angular/angular/issues/11075)
  +* **router:** routerLinkActive should not throw when not initialized ([#13273](https://github.com/angular/angular/issues/13273)) ([49c4b0f](https://github.com/angular/angular/commit/49c4b0f)), closes [#13270](https://github.com/angular/angular/issues/13270)
  +* **security:** allow calc and gradient functions. ([#13943](https://github.com/angular/angular/issues/13943)) ([bd15110](https://github.com/angular/angular/commit/bd15110))
  +* **upgrade:** detect async downgrade component changes ([#13812](https://github.com/angular/angular/issues/13812)) ([2250082](https://github.com/angular/angular/commit/2250082)), closes [#6385](https://github.com/angular/angular/issues/6385) [#6385](https://github.com/angular/angular/issues/6385) [#10660](https://github.com/angular/angular/issues/10660) [#12318](https://github.com/angular/angular/issues/12318) [#12034](https://github.com/angular/angular/issues/12034)
  +
  +
  +
  <a name="4.0.0-beta.3"></a>
  # [4.0.0-beta.3](https://github.com/angular/angular/compare/4.0.0-beta.2...4.0.0-beta.3) (2017-01-11)
  