* Make "Commit Graph" link a button and translate it

* Add title on Commit Graph page

* issue #1250, replace {pre,post}-receive and update hooks with a single shell script that does not require custom hooks to be a sh-script

* issue #1250, make script posix compilant

* v23, add migration script to update {pre,post}-receive and update hooks

* migration: use a more common name and rename v23 to v26 to avoid conflicts

* gofmt'ed and added copyright header

* fix SyncRepositoryHooks to also sync wiki repos

Fixes #1340

Signed-off-by: Arthur Loupforest <arthur.loupforest@outlook.fr>

* GPG commit validation

* Add translation

+ some little fix

* Move hash calc after retrieving of potential key + missing translation

* Add some little test

Fixes #1296

by always using SignInLink and SignUpLink in the form action

Without this patch a 401 is returned for unspecified endpoints, making
the LFS client ask for HTTP credentials. This behaviour was introduced
with the new locking API:

https://github.com/git-lfs/git-lfs/blob/master/docs/api/locking.md

* Add change-password admin command

* Improve user openid list CSS and regenerate CSS

* allow push to init a wiki repo

* compact error check

* Add notice that LFS mirroring is not supported

* Drop German translation

* Send notifications to partecipants in issue comments

Closes #1216

Includes test (still failing)

* Do not include "labelers" to participants

Fix test to expect what GetParticipants return

* Implement GPG API

* Better handle error

* Apply review recommendation + simplify database operations

* Remove useless comments

Fix nil-dereference bug

* Take navbar out of column
* Add styles to navbar
* Changed navbar classes
* Remove unneeded !important from index.css
* Remove unneeded !important from _explore.less

* Added script to download licenses from github

* Synced licenses with github repo

* Renamed scripts directory into contrib

* Added script to download gitignores from github

* Synced gitignores with github repo