Migrate to dep (#3972)

* Update makefile to use dep

* Migrate to dep

* Fix some deps

* Try to find a better version for golang.org/x/net

* Try to find a better version for golang.org/x/oauth2

vendor/github.com/go-xorm/core/README.md

@@ -1,116 +0,0 @@
-Core is a lightweight wrapper of sql.DB.
-
-[![CircleCI](https://circleci.com/gh/go-xorm/core/tree/master.svg?style=svg)](https://circleci.com/gh/go-xorm/core/tree/master)
-
-# Open
-```Go
-db, _ := core.Open(db, connstr)
-```
-
-# SetMapper
-```Go
-db.SetMapper(SameMapper())
-```
-
-## Scan usage
-
-### Scan
-```Go
-rows, _ := db.Query()
-for rows.Next() {
-    rows.Scan()
-}
-```
-
-### ScanMap
-```Go
-rows, _ := db.Query()
-for rows.Next() {
-    rows.ScanMap()
-```
-
-### ScanSlice
-
-You can use `[]string`, `[][]byte`, `[]interface{}`, `[]*string`, `[]sql.NullString` to ScanSclice. Notice, slice's length should be equal or less than select columns.
-
-```Go
-rows, _ := db.Query()
-cols, _ := rows.Columns()
-for rows.Next() {
-    var s = make([]string, len(cols))
-    rows.ScanSlice(&s)
-}
-```
-
-```Go
-rows, _ := db.Query()
-cols, _ := rows.Columns()
-for rows.Next() {
-    var s = make([]*string, len(cols))
-    rows.ScanSlice(&s)
-}
-```
-
-### ScanStruct
-```Go
-rows, _ := db.Query()
-for rows.Next() {
-    rows.ScanStructByName()
-    rows.ScanStructByIndex()
-}
-```
-
-## Query usage
-```Go
-rows, err := db.Query("select * from table where name = ?", name)
-
-user = User{
-    Name:"lunny",
-}
-rows, err := db.QueryStruct("select * from table where name = ?Name",
-            &user)
-
-var user = map[string]interface{}{
-    "name": "lunny",
-}
-rows, err = db.QueryMap("select * from table where name = ?name",
-            &user)
-```
-
-## QueryRow usage
-```Go
-row := db.QueryRow("select * from table where name = ?", name)
-
-user = User{
-    Name:"lunny",
-}
-row := db.QueryRowStruct("select * from table where name = ?Name",
-            &user)
-
-var user = map[string]interface{}{
-    "name": "lunny",
-}
-row = db.QueryRowMap("select * from table where name = ?name",
-            &user)
-```
-
-## Exec usage
-```Go
-db.Exec("insert into user (`name`, title, age, alias, nick_name,created) values (?,?,?,?,?,?)", name, title, age, alias...)
-
-user = User{
-    Name:"lunny",
-    Title:"test",
-    Age: 18,
-}
-result, err = db.ExecStruct("insert into user (`name`, title, age, alias, nick_name,created) values (?Name,?Title,?Age,?Alias,?NickName,?Created)",
-            &user)
-
-var user = map[string]interface{}{
-    "Name": "lunny",
-    "Title": "test",
-    "Age": 18,
-}
-result, err = db.ExecMap("insert into user (`name`, title, age, alias, nick_name,created) values (?Name,?Title,?Age,?Alias,?NickName,?Created)",
-            &user)
-```

vendor/github.com/go-xorm/core/benchmark.sh

@@ -1 +0,0 @@
-go test -v -bench=. -run=XXX

vendor/github.com/go-xorm/core/circle.yml

@@ -1,15 +0,0 @@
-dependencies:
-  override:
-    # './...' is a relative pattern which means all subdirectories
-    - go get -t -d -v ./...
-    - go build -v
-
-database:
-  override:
-    - mysql -u root -e "CREATE DATABASE core_test DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci"
-    
-test:
-  override:
-    # './...' is a relative pattern which means all subdirectories
-    - go test -v -race
-    - go test -v -race --dbtype=sqlite3