* Add LDAP Key Synchronization feature

Signed-off-by: Magnus Lindvall <magnus@dnmgns.com>

* Add migration: add login source id column for public_key table

* Only update keys if needed

* Add function to only list pubkey synchronized from ldap

* Only list pub ssh keys synchronized from ldap. Do not sort strings as ExistsInSlice does it.

* Only get keys belonging to current login source id

* Set default login source id to 0

* Some minor cleanup. Add integration tests (updete dep testify)

* Populate URL field of API commits

* fix orgmode_test

* improvements for supporting UI Location

* improved the comment

* refactor struct's time to remove unnecessary memory usage

* use AsTimePtr simple code

* fix tests

* fix time compare

* fix template on gpg

* use AddDuration instead of Add

Indexed search of repository contents (for default branch only)

* hide unactive on explore users and some refactors

* fix test for removed Organizations

* fix test for removed Organizations

* fix imports

* fix logic bug

* refactor the toConds

* Rename TestOrganizations to TestSearchUsers and add tests for users

* fix other tests

* fix other tests

* fix watchers tests

* fix comments and remove unused code

* improve protected branch to add whitelist support

* fix lint

* fix style check

* fix tests

* fix description on UI and import

* fix test

* bug fixed

* fix tests and languages

* move isSliceInt64Eq to util pkg; improve function names & typo

* refactor: remove workaround after the golang 1.7 release.

* remove unused import.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* refactor: Add remove function.

* refactor: rename

* refactor: update build flag