add protected-branch feature on pull-request page ...

* show commit-status if context is require status checks to pass.
  * disable merge if new commit-id has not `commit-status` ok on `Status-checkes`.
  * if some status includes required is not success, merge button is disabled.
  * if any required status is success, and some status not includes required, merge button is active, but button color is white.
  * if any required status is success, merge button is active, and button color is green.

Protected mark(octicon-shield) on Branches page

Readonly on online-editor

add protected branch list on branch setting page.

Add git proection api and form

create `repository setting branches` page and move default branch setting to there.

Fix repository creation error

(refs #970)Display permission change

Merge branch 'wiki-sidebar' of https://github.com/viliamjr/gitbucket into viliamjr-wiki-sidebar ...

# Conflicts:
#	src/main/twirl/gitbucket/core/wiki/page.scala.html

Fix compilation error caused by JGit update

Upgrade scalatra-forms to 1.0.0 that supports Scalatra 2.4.0

(refs #738)Revert content type detection ...

because Scalatra automatic charset detection issue has been fixed in Scalatra 2.4.0.
https://github.com/scalatra/scalatra/pull/500

3.10 release

(refs #990)Provides path for raw contents instead of ?raw=true

Adjust format

Merge pull request #1020 from P1tt187/sshd-RSA-keyprovider ...

update sshd dependency, rsa keyprovider as default

(refs #1004)Fix edit webhook link url

update sshd dependency ...

migrate to new sshd api
change the default key provider algorithm to RSA

Don't break lines in Wiki or markdown files on the repository viewer

(refs #1007)Fix max length constraint for repository owner and name at the repository creation form

(refs #1005)Fix typo

Merge pull request #1009 from team-lab/fix/webhook-push-pusher ...

(fixes #1008) pusher of webhook push event is not same as github's it

support legacy route of List Statuses for a specific Ref api

(fixes #1008) pusher of webhook push event is not same as github's it

A simple wiki page (markdown file "_Footer.md") is used as footer for the wiki. ...

Github specification:
https://help.github.com/articles/creating-a-footer/

- the footer is rendered below the wiki page content.
- a direct link to edit the footer.

(refs #987)Remove user related data when users delete themselves

Fix typo in comment

Merge branch 'master' into feature/webhook-review-comment

Upgrade scalatra-forms to 0.2.0 to solve performance issue

Remove the getWikiSideBar service ...

And use getWikiPage to avoid code repetition.