Add dep (#11)

* Add Gopkg.* and vendor/ dir

* Add info about running dep ensure in readme

.gitignore

@@ -21,4 +21,6 @@
 # Files without extension (Linux binary, for example)
 *
 !/**/
-!*.*
+!*.*
+# Golang vendor directory
+vendor/

Gopkg.lock

@@ -0,0 +1,28 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  digest = "1:cdb899c199f907ac9fb50495ec71212c95cb5b0e0a8ee0800da0238036091033"
+  name = "github.com/mattn/go-runewidth"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "ce7b0b5c7b45a81508558cd1dba6bb1e4ddb51bb"
+  version = "v0.0.3"
+
+[[projects]]
+  branch = "master"
+  digest = "1:01d9e47830ef6077fb6f91033b0e83f324ad5966d11ed3daa4a5822ace876dab"
+  name = "github.com/nsf/termbox-go"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "60ab7e3d12ed91bc1b2486559c4b3a6b62297577"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  input-imports = [
+    "github.com/mattn/go-runewidth",
+    "github.com/nsf/termbox-go",
+  ]
+  solver-name = "gps-cdcl"
+  solver-version = 1

Gopkg.toml

@@ -0,0 +1,11 @@
+[[constraint]]
+  name = "github.com/mattn/go-runewidth"
+  version = "0.0.3"
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/nsf/termbox-go"
+
+[prune]
+  go-tests = true
+  unused-packages = true

README.md

@@ -25,6 +25,7 @@ Note: go version 1.10 or higher is required building it from the source.
 ```bash
 git clone https://github.com/Microsoft/ethr.git
 cd ethr
+dep ensure -v
 go build
 ```