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.
Remove invalid char
Apply mouse hover style
Add active icons for side-menu
Side-menu is completed!