Fix registration error info typo
Add .adoc file extension for AsciiDoc

Add .adoc file extension for AsciiDoc as it's a very popular extension to use and the one recommended by the Asciidoctor project.
Add check for orphaned UsersGroups
JIRA project identifiers may also contain dashes '-'
Switched line endings to LF for system_hooks.md

It was checked in with Windows style line endings.
Fixed some minor typos.
update changelog, add remainder 6.6.X changlog entries
 Merge branch 'update/changelog' into 'master'

Update/Changelog

Update the changelog to add the remaining 6.6.X entries
Merge pull request #6534 from dlorch/master

JIRA project identifiers may also contain dashes '-'
Restore old travis.yml

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'master' of github.com:gitlabhq/gitlabhq
Merge branch 'master' of gitlab.com:gitlab-org/gitlab-ce
Move project members api to separate file

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Show link to public projects for new users.
Link to blob instead of linking to wiki.
Wiki will show relative links related to the wiki gollum repository.
Update wiki tests.
Update markdown documentation, fix wiki spec.
Use new grape-entity gem with fixed nested entities

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Add current user permissions info to /api/projects/:id.json

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>