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fix #352. rename messages.en to messages
replace the word "nforge" with "yobi"
fix #401. fill omitted message keys.

- replace notification.type.pull.request to notification.type.pullrequest
AccessControl: Do not allow to access orphan resource.

When trying to check whether someone can access a resource, if the
resource belongs to a project but the project is missing,
an IllegalStateException is thrown.
assignee: chaning to null without error
help: change install guid url from demo.yobi.io/dlab/yobi to github.com/nforge/yobi
fixed #355: removed duplicated metion list
pullrequest: changed icon at commit event message
PullRequest: Fix missing object exception
board: fixed comment position from right side to meta info wrap
PullRequest: Fix ArrayIndexOutOfBoundsException

While showing outdated comment, sometimes ArrayIndexOutOfBoundsException
has occured if the commented line is removed from the newer pullrequest.

side effect: After applying this patch, any comment on a file but not on
a latest commit of the file is considered as a outdated comment.
prevent duplicated uploader/downloader init.

- fix wrong attachment list container in partial_diff_comment_on_line
pullrequest:change icon at comment wrap
SiteApp: Remove unused code (updatePostNumber)
site: fixed remove padding on body
add bobbom padding on html
remove overflow style at project-page-wrap class and tab-content class
PullRequest: Fix possible exception while conflict

If a pull request is conflicted, an IllegalStateException could occur
because the pull request does not have mergedCommitIdFrom and
mergedCommitIdTo even if it is not in merging.
pull-request: Remove patch in PullRequest

1. remove patch in PullRequest
2. remove unused code
3. add patch evolution script removal
pull-request form: Apply server-side code diff rendering

1. Apply server-side code diff rendering
2. Add changed commit validation
pull-request diff: add default parameter on partial_diff