Use "Conversation" instead of "Discussion" ...

Github uses "Conversation" now.

(refs #383)Disable "New Issue" button in the new issue creation page.

Show diff for files other than markdown by "Preview" button

Hide "Edit" button if target is not head of the branch.

Fix title in file editing.

Fix style broken in Firefox

Repository url protocol label should be change ...

Like repository url.

Merge branch 'master' of https://github.com/takezoe/gitbucket

(refs #372)Use shift key instead if ctrl key to select region

Fix width styles ...

* issue updation title and content
* issue new comment
* pull request new comment

(refs #373)Preview markdown in the text file editor.

(refs #230)Fix markdown preview styles

(refs #372)Select lines by clicking line number in blob view

bugfix

bugfix

Fix typo

Fix broken layout in pull request detail page

Fix readme styles

Merge branch 'ui-refreshing' ...

Conflicts:
	src/main/twirl/index.scala.html

Fix commit id style in file list

Fix file list style in repository viewer

Fix header button size

Fix h1-h6 styles

Fix wiki styles

Fix button style in blob page

Add branch switcher

Fix header and side-menu styles

Fix header style in wiki pages

Side-menu is completed!

Apply mouse hover style