Initial Commit

Based on http://www.pentestgeek.com/2013/09/18/invoke-shellcode/
Powershell allows you to download a webpage and store it as a string
We can then load a script as the response and execute that script.
This will be added to the power-ducky toolkit soon.
Merge branch 'master' of https://github.com/b00stfr3ak/fast_meterpreter