Unscrew the author name

  * No twitter handles in author names. the `<blank>@name` screws up some parsers
  * Should be in the form of `name[at]domain.tld`, not `name at domain dot tld`


## Verification:

````

msf > info post/windows/gather/forensics/browser_history 

       Name: Windows Gather Skype, Firefox, and Chrome Artifacts
     Module: post/windows/gather/forensics/browser_history
   Platform: Windows
       Arch: 
       Rank: Normal

Provided by:
  Joshua Harper <josh@radixtx.com>

Description:
  Gathers Skype chat logs, Firefox history, and Chrome history data 
  from the target machine.


````