Add features (additional filter condition / disable mail resolve) to LDAP authentication.
Sync upstream/maste to master and Merge branch 'master' into add-features-to-ldapauth

Conflicts:
	src/main/scala/app/IndexController.scala
	src/main/scala/service/SystemSettingsService.scala
	src/main/twirl/admin/system.scala.html
Revert line separator from LF to CRLF
Merge branch 'master' into add-features-to-ldapauth
Revert unnecessary format changes.
Merge branch 'master' into add-features-to-ldapauth
Modify wrong label of "Additional filter condition" label in system settings page
Merge branch 'master' into add-features-to-ldapauth
Change trigger of "Disalbe mail resolve is enalbed" from "When system settings check-box is ON" to "When mail attribute is empty".
Merge branch 'master' into add-features-to-ldapauth
Merge branch 'master' into add-features-to-ldapauth

Conflicts:
	src/main/twirl/account/edit.scala.html
Merge commit '5317ac5e031a29438657952fb882532af296135b' (tag 1.12) into add-features-to-ldapauth
Merge commit Tag 1.13 ('3e82534c78a72e17dd3b79e091521d75cb4d3855') into add-features-to-ldapauth

Conflicts:
	src/main/scala/service/AccountService.scala
	src/main/scala/util/LDAPUtil.scala
Merge commit Tag 2.0 'db5395ddbc4aef485415408720dd09cfc215b527' into add-features-to-ldapauth

Conflicts:
	src/main/twirl/account/edit.scala.html
Show newsfeed of private repo to its owner
Show newsfeed of private repo to members of owner group
Disable submit buttons while performing validation
Disable submit buttons while performing validation
Merge branch 'add-features-to-ldapauth' of https://github.com/yjkony/gitbucket into yjkony-add-features-to-ldapauth

Conflicts:
	src/main/scala/app/IndexController.scala
	src/main/scala/service/SystemSettingsService.scala
	src/main/scala/util/LDAPUtil.scala
	src/main/scala/util/Notifier.scala
AccountUtil is merged to LDAPUtil