Adding golang/dep

[nmengin]

Adding the new tool golang/dep for the libkv project. This tool allows dependencies management.

Fix versions for dependencies as constraints or overrides when necessary.

[coveralls]

Coverage remained the same at 84.124% when pulling 307f97f2d9077ecf8c06c5930a6d97073c5bd4f0 on nmengin:feature/add-go-dep into 0c1d2148a135219aa583425f6b2a943fbba52417 on abronan:master.

[abronan]

Hi @nmengin, thank you for the PR!

I tried to avoid using any dependency management on the libkv side because I think it is better handled on the side of projects using the library (using dep/glide/godep/etc.). It is true that this is annoying because of occasional breakage of client libraries (for example recently with etcd/client and ugorji/go, although I submitted a change upstream in etcd to fix that).

I'm not against including this change but I'm not sure this is entirely necessary either (considering the small scale of the project).

Thoughts?

[abronan]

Also it's broken on the CI somehow.

[nmengin]

Ok @abronan.

I just did it in the way to compile the master branch and submit you PR about ETCD management. I let you close this PR.

[coveralls]

Coverage remained the same at 84.124% when pulling a90e52c60dcb4ac1050af8ce9478992857d2af4f on nmengin:feature/add-go-dep into 0c1d2148a135219aa583425f6b2a943fbba52417 on abronan:master.

[coveralls]

Coverage remained the same at 84.124% when pulling 174070b8aa4c96b2d54c1a0ef9ccbaf76f404934 on nmengin:feature/add-go-dep into 0c1d2148a135219aa583425f6b2a943fbba52417 on abronan:master.