Issue due date (#3794)

* Started adding deadline to ui

* Implemented basic issue due date managing

* Improved UI for due date managing

* Added at least write access to the repo in order to modify issue due dates

* Ui improvements

* Added issue comments creation when adding/modifying/removing a due date

* Show due date in issue list

* Added api support for issue due dates

* Fixed lint suggestions

* Added deadline to sdk

* Updated css

* Added support for adding/modifiying deadlines for pull requests via api

* Fixed comments not created when updating or removing a deadline

* update sdk (will do properly once go-gitea/go-sdk#103 is merged)

* enhanced updateIssueDeadline

* Removed unnessecary Issue.DeadlineString

* UI improvements

* Small improvments to comment creation
+ ui & validation improvements

* Check if an issue is overdue is now a seperate function

* Updated go-sdk with govendor as it was merged

* Simplified isOverdue method

* removed unessecary deadline to 0 set

* Update swagger definitions

* Added missing return

* Added an explanary comment

* Improved updateIssueDeadline method so it'll only update `deadline_unix`

* Small changes and improvements
* no need to explicitly load the issue when updating a deadline, just use whats already there
* small optimisations

* Added check if a deadline was modified before updating it

* Moved comment creating logic into its own function

* Code cleanup for creating deadline comment

* locale improvement

* When modifying a deadline, the old deadline is saved with the comment

* small improvments to xorm session handling when updating an issue deadline
+ style nitpicks

* style nitpicks

* Moved checking for if the user has write acces to middleware

1 files changed, 3 insertions, 3 deletions

diff --git a/vendor/vendor.json b/vendor/vendor.json
index 2b5a158bf8..5b5b640f47 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -9,10 +9,10 @@
 			"revisionTime": "2018-04-21T01:08:19Z"
 		},
 		{
-			"checksumSHA1": "PWaIU7g1YSkETxka2DIS1EYsPK0=",
+			"checksumSHA1": "xXzi8Xx7HA3M0z3lR/1wr1Vz1fc=",
 			"path": "code.gitea.io/sdk/gitea",
-			"revision": "cdbef997666132599cc92dc22aa94de3db04adeb",
-			"revisionTime": "2018-03-02T14:48:43Z"
+			"revision": "142acef5ce79f78585afcce31748af46c72a3dea",
+			"revisionTime": "2018-04-17T00:54:29Z"
 		},
 		{
 			"checksumSHA1": "bOODD4Gbw3GfcuQPU2dI40crxxk=",