[templates/rest_framework/base.html] Separate `object-form' and `generic-content-form' IDs for POST and PUT forms

Signed-off-by: Anton D. Kachalov <mouse@yandex-team.ru>
Merge pull request #1905 from ya-mouse/master

[templates/rest_framework/base.html] Separate IDs for POST and PUT forms
Update links in 2.4-announcement.md

The links to Django Rest Framework pages were 404ing because the URLs include a slash.
Merge pull request #1925 from kevinlondon/patch-5

Update links in 2.4-announcement.md
Add djoser to authentication docs.
Add to main 3rd party resources list.
Merge pull request #1959 from konradhalas/add-djoser-to-docs

Add djoser to authentication docs
Add docs regarding linking third party packages
Merge pull request #1967 from jpadilla/master

Add docs regarding linking third party packages
Maintain order of views on router for api root view.
Used Django utils SortedDict instead of stdlib's OrderedDict for
wider compatability.
Merge pull request #1969 from erikcw/ordered

Maintain order of views on router for api root view.