Update README.md
Fix JavaScript and CSS for attachment area
Fix comment
Move duplicated JavaScript and CSS for diff to common files
Fix #358
Improve update pull request query

commitIdFrom and commitIdTo columns update by one query.
Add link for image file

* Render image tag with link tag on issue and wiki
* Correct response content-type of attached image on issue
Disable AceEditor for non text files
Migrate: add extension to files which are attached to issue
Global navigation moves to side menu.
Add icons for new UI
Folding side-menu
Rename header.scala.html to menu.scala.html
Add icon for repository resttings
Fix tab style
Remove unnecessary parts and styles.
Revert style for fork count
Add <div class="container"> to pages outside of repository.
Fix issue and pull request creation form styles
Disable bootstrap tooltip because icon link blinks.