Update import paths from github.com/go-gitea to code.gitea.io (#135)

- Update import paths from github.com/go-gitea to code.gitea.io
- Fix import path for travis

See https://docs.travis-ci.com/user/languages/go#Go-Import-Path

vendor/code.gitea.io/go-sdk/gitea/pull.go

@@ -0,0 +1,37 @@
+// Copyright 2016 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package gitea
+
+import (
+	"time"
+)
+
+// PullRequest represents a pull reqesut API object.
+type PullRequest struct {
+	// Copied from issue.go
+	ID        int64      `json:"id"`
+	Index     int64      `json:"number"`
+	Poster    *User      `json:"user"`
+	Title     string     `json:"title"`
+	Body      string     `json:"body"`
+	Labels    []*Label   `json:"labels"`
+	Milestone *Milestone `json:"milestone"`
+	Assignee  *User      `json:"assignee"`
+	State     StateType  `json:"state"`
+	Comments  int        `json:"comments"`
+
+	HeadBranch string      `json:"head_branch"`
+	HeadRepo   *Repository `json:"head_repo"`
+	BaseBranch string      `json:"base_branch"`
+	BaseRepo   *Repository `json:"base_repo"`
+
+	HTMLURL string `json:"html_url"`
+
+	Mergeable      *bool      `json:"mergeable"`
+	HasMerged      bool       `json:"merged"`
+	Merged         *time.Time `json:"merged_at"`
+	MergedCommitID *string    `json:"merge_commit_sha"`
+	MergedBy       *User      `json:"merged_by"`
+}