Use httpie for tutorials
Only show pip install for httpie
remove unsused link
Added test to show potential issue with UniqueValidator being added to the underlying Django model.
updates based on suggestions
Fix missing validated_data in `raise_errors_on_nested_writes` (#2221)
Amend ViewSet docs to warn of potential problem

I went through this exact problem and so thought the docs might
benefit from a small hint at the appropriate point.
Merge pull request #2224 from linovia/bugfix/2221

Fix missing validated_data in `raise_errors_on_nested_writes` (#2221)
Merge pull request #2226 from mhenwood/amend_viewset_docs

Amend ViewSet docs to warn of potential problem
Fixed display issues with tooltips.
Ported a couple of templates to Bootstrap 3.x.
Fixed unit test for auth login
Merge pull request #2187 from loic/cosmetic_fixes

Cosmetic fixes in the API browser HTML.
Add misc note about localization
Merge pull request #2229 from jpadilla/localization-note

Add misc note about localization
Added ListSerializer.validate(). Closes #2168.
Merge pull request #2232 from tomchristie/validate-in-list-serializer

Added ListSerializer.validate().
Added missing translation markers in realtions.py. Closes #2231.
Added 3.0 to release notes.
fixed indentations