add traceur runtime to gruntfile
remove bin from repo
fix require vm2
async/await
fix cli and remove vm2 dependency
channels
define variables in destructing patterns
undefined literal
0.1.1
fix 0.1.1 links
fix a cli problem

if i use the cli "spider" without any parameter, the cli.js would throw an error says "opts.files is undefined". I think if I do this, the cli should return a help message, so i add a if statement to find whether opts.files is undefined, if it is, console a help message and exit.    
I think this is a better way than throw an error directly :-)    
PS.spider-lang is cool and really want submit more pr : p
Merge pull request #87 from jabez128/master

fix a cli problem
fix cli execute script (3rd time)
0.1.2
contributing
separate logic from cli
Merge remote-tracking branch 'origin/master'

Conflicts:
	package.json
move changelog to CHANGELOG.md
cli default behaviour
fix require("spider-script")