extract scripts into dext-core-utils; fixed packages

Author: vutran

.eslintrc

@@ -0,0 +1,6 @@
+{
+  "extends": "airbnb/base",
+  "rules": {
+    "no-console": 0
+  }
+}

api/errors.js

@@ -2,7 +2,7 @@
 
 const args = require('args');
 const chalk = require('chalk');
-const api = require('./api');
+const { api } = require('dext-core-utils');
 
 args.command(['install', 'i'], 'Install a new plugin or theme', (name, sub) => {
   const plugin = sub[0];

api/index.js

@@ -17,10 +17,8 @@
   "license": "MIT",
   "dependencies": {
     "args": "^2.0.0",
-    "conf": "^0.11.2",
-    "download": "^5.0.2",
-    "npm-name": "^3.0.0",
-    "rimraf": "^2.5.4"
+    "chalk": "^1.1.3",
+    "dext-core-utils": "^0.1.0"
   },
   "devDependencies": {
     "eslint": "^3.4.0",