Use package manager (govendor or something else)

[AkihiroSuda]

govendor seems friendly to go get because it utilizes the standard vendor directory

https://github.com/kardianos/govendor

[AkihiroSuda]

Plus we should remove some dependencies...

$ du -h --max-depth=3 /tmp/gopath/                                                                                                                             
6.9M    /tmp/gopath/src/golang.org/x
6.9M    /tmp/gopath/src/golang.org
1.5M    /tmp/gopath/src/github.com/hashicorp
628K    /tmp/gopath/src/github.com/fgrehm
4.6M    /tmp/gopath/src/github.com/hanwen
624K    /tmp/gopath/src/github.com/mattn
676K    /tmp/gopath/src/github.com/gorilla
288K    /tmp/gopath/src/github.com/satori
128M    /tmp/gopath/src/github.com/docker
644K    /tmp/gopath/src/github.com/armon
1.1M    /tmp/gopath/src/github.com/kr
532K    /tmp/gopath/src/github.com/bgentry
2.7M    /tmp/gopath/src/github.com/golang
1.5M    /tmp/gopath/src/github.com/cihub
7.1M    /tmp/gopath/src/github.com/opencontainers
1.4M    /tmp/gopath/src/github.com/stretchr
876K    /tmp/gopath/src/github.com/syndtr
8.1M    /tmp/gopath/src/github.com/fsouza
1.1M    /tmp/gopath/src/github.com/leesper
744K    /tmp/gopath/src/github.com/BurntSushi
276K    /tmp/gopath/src/github.com/vaughan0
2.3M    /tmp/gopath/src/github.com/spf13
676K    /tmp/gopath/src/github.com/fsnotify
460K    /tmp/gopath/src/github.com/osrg
696K    /tmp/gopath/src/github.com/mitchellh
6.6M    /tmp/gopath/src/github.com/google
692K    /tmp/gopath/src/github.com/magiconair
276K    /tmp/gopath/src/github.com/oleiade
880K    /tmp/gopath/src/github.com/AkihiroSuda
832K    /tmp/gopath/src/github.com/vishvananda
760K    /tmp/gopath/src/github.com/Sirupsen
175M    /tmp/gopath/src/github.com
7.1M    /tmp/gopath/src/gopkg.in/mgo.v2
1.7M    /tmp/gopath/src/gopkg.in/yaml.v2
8.8M    /tmp/gopath/src/gopkg.in
191M    /tmp/gopath/src
27M     /tmp/gopath/bin
628K    /tmp/gopath/pkg/linux_amd64/golang.org
33M     /tmp/gopath/pkg/linux_amd64/github.com
3.2M    /tmp/gopath/pkg/linux_amd64/gopkg.in
37M     /tmp/gopath/pkg/linux_amd64
37M     /tmp/gopath/pkg
254M    /tmp/gopath/

[AkihiroSuda]

Tool comparison
https://peter.bourgon.org/go-best-practices-2016/#dependency-management