Add Timer & kill

Implemented `time` and `kill`, due to name conflict on windows i named it `timer`

- `timer` (same as time on unix to time how load a proves takes 
eg. `timer curl http://google.com`
```
	C:\tmp>timer curl google.com
	<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
	<TITLE>301 Moved</TITLE></HEAD><BODY>
	<H1>301 Moved</H1>
	The document has moved
	<A HREF="http://www.google.com/">here</A>.
	</BODY></HTML>

	Time:  1.223s
```
- `kill` - simple way to kill system process based on `taskkill` (I can send a pull request on this if you want)
eg.

```
    kill firefox 
    kill notepad chrome taskmgr
```