Add ethereumjs-util to libs directory

libs/ethereumjs-util/package.json

@@ -0,0 +1,125 @@
+{
+  "name": "ethereumjs-util",
+  "version": "6.0.0",
+  "description": "a collection of utility functions for Ethereum",
+  "main": "dist/index.js",
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "browserify index.js -s ethUtil -o /tmp/ethereumjs-util.js",
+    "coverage": "npm run build:dist && istanbul cover _mocha",
+    "coveralls": "npm run coverage && coveralls <coverage/lcov.info",
+    "lint": "standard",
+    "prepublishOnly": "npm run test && npm run build:dist",
+    "test": "npm run lint && npm run test:node && npm run test:browser",
+    "test:browser": "npm run build:dist && karma start karma.conf.js",
+    "test:node": "npm run build:dist && istanbul test mocha -- --reporter spec",
+    "build:dist": "babel index.js --source-root ./ -d ./dist",
+    "build:docs": "documentation build ./index.js --github --sort-order='alpha' -f md > ./docs/index.md"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/ethereumjs/ethereumjs-util.git"
+  },
+  "keywords": [
+    "ethereum",
+    "utilties"
+  ],
+  "author": "mjbecze <mjbecze@gmail.com>",
+  "contributors": [
+    {
+      "name": "Tim Coulter",
+      "email": "tim@timothyjcoulter.com",
+      "url": "https://github.com/tcoulter",
+      "contributions": 1,
+      "additions": 2,
+      "deletions": 2
+    },
+    {
+      "name": "Nick Dodson",
+      "url": "https://github.com/SilentCicero",
+      "contributions": 2,
+      "additions": 26,
+      "deletions": 2
+    },
+    {
+      "name": "Mr. Chico",
+      "url": "https://github.com/MrChico",
+      "contributions": 1,
+      "additions": 11,
+      "deletions": 1
+    },
+    {
+      "name": "Dũng Trần",
+      "email": "tad88.dev@gmail.com",
+      "url": "https://github.com/tad88dev",
+      "contributions": 2,
+      "additions": 5,
+      "deletions": 5
+    },
+    {
+      "name": "Alex Beregszaszi",
+      "email": "alex@rtfs.hu",
+      "url": "https://github.com/axic",
+      "contributions": 77,
+      "additions": 1796,
+      "deletions": 642
+    },
+    {
+      "name": "Taylor Gerring",
+      "url": "https://github.com/tgerring",
+      "contributions": 1,
+      "additions": 1,
+      "deletions": 1
+    },
+    {
+      "name": "Kirill Fomichev",
+      "email": "fanatid@ya.ru",
+      "url": "https://github.com/fanatid",
+      "contributions": 8,
+      "additions": 32,
+      "deletions": 16
+    },
+    {
+      "name": "kumavis",
+      "email": "aaron@kumavis.me",
+      "url": "https://github.com/kumavis",
+      "contributions": 2,
+      "additions": 2,
+      "deletions": 2
+    },
+    {
+      "name": "Alexander Sinyagin",
+      "email": "sinyagin.alexander@gmail.com",
+      "url": "https://github.com/asinyagin",
+      "contributions": 1,
+      "additions": 3,
+      "deletions": 1
+    }
+  ],
+  "license": "MPL-2.0",
+  "bugs": {
+    "url": "https://github.com/ethereumjs/ethereumjs-util/issues"
+  },
+  "homepage": "https://github.com/ethereumjs/ethereumjs-util",
+  "dependencies": {
+    "bn.js": "^4.11.0",
+    "create-hash": "^1.1.2",
+    "ethjs-util": "^0.1.6",
+    "keccak": "^1.0.2",
+    "rlp": "^2.0.0",
+    "safe-buffer": "^5.1.1",
+    "secp256k1": "^3.0.1"
+  },
+  "devDependencies": {},
+  "standard": {
+    "globals": [
+      "describe",
+      "it"
+    ],
+    "ignore": [
+      "dist/**"
+    ]
+  }
+}