* Add units concept for modulable functions of a repository

* remove unused comment codes & fix lints and tests

* remove unused comment codes

* use struct config instead of map

* fix lint

* rm wrong files

* fix tests

* Allow using custom time format

I need to use custom time format in `conf/app.ini' like 

    FORMAT = 2006-01-02 15:04:05

so that Gitea will display '2017-01-30 08:41:49'
check this answer for more constants to format date  <http://stackoverflow.com/a/20234207/2570425> 

PS: First GO commit

* Refactor and validate TimeFormat (must have 2006, 01, 02, 15, 04 and 05)

Also add unit tests

refactor: set default order by recently star on start tab

Changed English word "user" to German word "Benutzer" as suggested by https://github.com/go-gitea/gitea/pull/727#issuecomment-274483755

* track assignee for issue

* fix lint

* use getUserByID instead Get

This change corrects a few logging issues:

 * Standardized formatting errors with '%v'.
 * Standardized failure warning word usage.
 * Corrected an instance of using the standard log library when
   the gitea log library should be used instead.

Remove unnecessary calls to repo.GetOwner() in context handlers

* Use local folder for xgo

* Always do crosscompile and testing to fail early

* Added mips* values for boltdb

In order to get master building again I have applied these 2 additional
files to boltdb. This should get dropped when
https://github.com/boltdb/bolt/issues/656 gets solved.

* Unit tests and remove unused functions in models/notification

* Read -> Unread

* track labels changed on issue view & resolved #542

* add missing head comment & sort & fix refresh

* Allow custom public files

* Gofmt code, lots of places not related to this pr

Notifications step 5

Unit tests for models/wiki

Unit tests and bug fix for models/org

PullRequestCtx.HeadInfo did not contain the current selected branch
causing issue #304

* Update ru-RU translation

* Fixed translation for ru-RU. Incorrect quotation marks.

* Update ru-RU translation. Changed 'issue' translation. Updated 'notifications' translation.

* Changed translation of “issue” from “trouble” to “task”. This translation is being used in most tracking systems.

* Improved translation of the sentence to sound better in Russian.

Fix SSH server on Windows when running as service