Extend API to allow CRUD labels ...

Add Labels API
    * List all labels for this repository
    * Get a single label
    * Create a label
    * Update a label
    * Delete a label

    Reject duplicated label name

    Add test case for LabelsService

(fixes #1062) Remove a wrong link

Merged branch master into solidbase-integration

Merge pull request #1061 from ShunsukeTadokoro/master ...

Fix styles

Update for GitBucket 3.11

Fix styles

Apply DDL for branch protection to solidbase migration

Merge pull request #1052 from team-lab/change-issue-action-comment-style ...

Change action-comment styles that follow github.

Update README.md

Merge branch 'master' into solidbase-integration ...

Conflicts:
	src/main/scala/gitbucket/core/model/Profile.scala
	src/main/scala/gitbucket/core/servlet/AutoUpdate.scala

Merge branch 'team-lab-feature/protected-branch'

Fix testcase

Change CommitHook to ReceiveHook

Change CommitHook interface

Change action-comment styles that follow github.

Limit recent updated repositories list. #1011

Update README.md

Update README.md

Remove unused model and service for PLUGIN table

Merge branch 'master' into solidbase-integration

Fix testcase

Add commit hook extension point for plugins

Small fix about code style

Fix version and view

Merge branch 'feature/protected-branch' of https://github.com/team-lab/gitbucket into team-lab-feature/protected-branch

Fix preview bug in online editor of repository viewer

Update haeding style to bold

(refs #1031)Fix issue link processing in Markdown

Fix Markdown preview style ...

However styles in markdown-body affect tab. So there are invalid margin at the top of the tab.

(refs #984)Fix special character problem in repository viewer