Add dep. (#1326)

Dep is a prototype dependency management tool.

README.md

@@ -786,6 +786,7 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
 
 *Libraries for package and dependency management.*
 
+* [dep](https://github.com/golang/dep) - Go dependency tool.
 * [gigo](https://github.com/LyricalSecurity/gigo) - PIP-like dependency tool for golang, with support for private repositories and hashes.
 * [glide](https://github.com/Masterminds/glide) - Manage your golang vendor and vendored packages with ease. Inspired by tools like Maven, Bundler, and Pip.
 * [godep](https://github.com/tools/godep) - dependency tool for go, godep helps build packages reproducibly by fixing their dependencies.