Add pagination headers to already paginated API resources
Following #3045, I've added pagination headers using already available Kaminari methods.
## Pagination headers in action

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I've also added a shared example to test paginated API resources.
A possible next step would be to paginate all the API resources that return an array.
See merge request !2426
* master: (51 commits)
Fix version
Fix specs and rubocop warnings
Improve the consistency of commit titles, branch names, tag names, issue/MR titles, on their respective project pages
fixed LDAP activation on login to use new ldap_blocked state
Fix Admin/Users view to position buttons without spacing magic
Update to Go 1.5.3
Fix the undefinded variable error in Project's safe_import_url method
Update CHANGELOG [ci skip]
Add some cosmetic changes to variables API documentation [ci skip]
Fix misaligned edit button in milestone collection partial
Update button styles for Milestones#show
Modify builds API documentation style [ci skip]
Modify :ci_variable factory
Ensure the API doesn't return notes that the current user shouldn't see
Add 'Build' prefix to Variables entry name in API docs index
Fix some typos
Add spec for Note#cross_reference_not_visible_for?
Remove (invalid) timestamp formatting
Move `BroadcastMessage#status` to a helper since it's presentational
Update CHANGELOG
...
Conflicts:
doc/api/README.md
lib/api/api.rb
lib/api/entities.rb
This changes the format of metadata to handle paths, that may contain
whitespace characters, new line characters and non-UTF-8 characters.
Now those paths along with metadata in JSON format are stored as
length-prefixed strings (uint32 prefix).
Metadata file has a custom format:
1. First string field is metadata version field (string)
2. Second string field is metadata errors field (JSON strong)
3. All subsequent fields is pair of path (string) and path metadata
in JSON format.
Path's metadata contains all fields that where possible to extract from
ZIP archive like date of modification, CRC, compressed size,
uncompressed size and comment.