* add support for paging to ListGroupMembers

* making the ListGroupMembersOptions explicit

Adds only_allow_merge_if_all_discussions_are_resolved and approvals_before_merge fields to Project and EditProjectOptions structs (#111)

* Add parameter Simple to ListProjectsOptions struct

Enables you to query list of projects with minimal
information much faster.

ListProjectsOptions{
  Simple *bool url:"simple,omitempty" json:"simple,omitempty"
}

Fields returned:
ID, HTTPURLToRepo, WebURL, Name, NameWithNameSpace, Path
PathWithNamesPace

* Add parameter Visibility to ListProjectOptions

Limit by visibility public, internal or private

ListProjectOptions{
  Visibility *string url:"visibility:omitempty" json:"visibility,omitempty"
}

* Support for AcceptMergeRequest parameters

* Fixup PR #82

* PipelineEvent type changed

* Added BuildEvent

* fixing typo

* Refactoring with existing struct type

* Fixed different type object form

* fixing auto generated interface types to string

* Added PushEvent, MergeRequestEvent, PipelineEvent, BuildEvent unmarshal test

* Added GroupMergeEvent type

* Remove GroupMergeEvent and fix MergeEvent for Group Webhooks

* Add Milestone.StartDate to Issue

* Use Milestone struct

* Use pointer for Milestone

* add EMail endpoints from gitlab api

* added changes requested

- gitlab.CreateProjectOptions.ContainerRegistryEnabled
- gitlab.Project.OnlyAllowMergeIfBuildSucceeds
- gitlab.Project.LFSEnabled
- gitlab.Project.RequestAccessEnabled
- gitlab.Project.ContainerRegistryEnabled

* add parameters “since” and “until”

* update API Docs URL

* closes #77 - adds `web_url` field to `Issue`

* Add new fields in Issue struct to bring it up-to-date with Gitlab API

The following fields have been added to `Issue` struct
* `Subscribed`
* `UserNotesCount`
* `Confidential`
* `DueDate`
* `WebURL`

Add ops is equal to null judgment

https://gitlab.com/gitlab-org/gitlab-ce/issues/21468

Tags is now a separate service, following the Gitlab API structure.

* Add support for /projects/*/builds/*
PR for issue #42

* fix

* modify comments

* modify comments

* change styles and perform some addtion/deletion according to comments

* define Runner as a independent type

* define ArtifactsFile as a independent type

* remove type Runner and ArtifactsFile, and remove field Coverage

Check out http://docs.gitlab.com/ce/api/users.html

added web-hooks: tag_push_events, note_events, build_events, pipeline_events, wiki_page_events, enable_ssl_verification (#69)

* Simplify some code via gosimple

See https://github.com/dominikh/go-simple.

* strings: use bytes.Buffer directly

It has methods to write strings and bytes already, which is much easier
and also faster than going through a regular write of []byte.

* Run go fmt

* CI: Bump Go versions

Convert all *Options structs to use pointer for fields and fixup the README and project struct (#66)

* Convert all *Options structs to use pointer for fields, per #29.

* Update README and fix project struct

The `project` struct was the only one that had all pointers, so I reverted that to make things consistent again.

The same goes for the `time.Time` pointers. In some cases the API does not return a time and if the field is not a pointer to `time.Time`, this will generate an error. So to be consistent now all `time.Time` fields are pointer fields.