Documented 'Entities & Entity mapping' section
Documented "translation" section
Clearified controllers as services
Merge pull request #2601 from WouterJ/update_override_docs

Update override article
[#2601] Very minor tweaks to overriding article
Fixed missing - in the yml
Updated dom_crawler.rst
Voters should refer to authorization, not authentication.

Voters have nothing to do with authentication, only authorization.  I have updated the terminology as such.  I was caught by this when trying to build custom authentication due to the terminology of this page.
[#2636] Backporting syntax fix
Added documentation for GroupSequence
Merge pull request #2647 from ClementGautier/2.0

[WIP] Added documentation for GroupSequence
[#2647] Minor tweaks to new validation group sequence docs
Add some clarification to Quick Tour Working with Environments

Also, for the session token: identify what the "weird" hex number is, and and replace "weird" with "long" (a more apt description).
Merge pull request #2674 from jbafford/i2672

Add some clarification to Quick Tour Working with Environments