Added organization
Organization: user can make organization
Merge branch `feature/organization-new` of whiteship/yobi

from pull request 640
remove some initial data which bring about an error.
Project: create new Project on organization
Project: maintain input data on form validation error
Merge branch `organization` of alecsiel/yobi

from pull request 651
Merge branch `feature/organization` of changsung/yobi

from pull request 650
Organization: link to an organization
Merge branch 'org/link' of whiteship/yobi

from pull request 655
Organizatino: show projects and members
Merge branch 'org/home/projects' of whiteship/yobi

from pull request 657
Header: add new group button and change add button style
Merge branch 'feature/organization-add-button' of insanehong/hive

from pull request 684
Diff: implements for block comments on .diff-body
BlockComment: reduce extra fat of CodeCommentBlock.js
added model
CommentThread: find by commitId
add state test case
add test case for getting comment from the thread