implements a simple grep feature for msfconsole

example usage:
grep https show payloads
grep -i iPhone show exploits
grep -i sp3 show targets
grep '^[\s]*generic/c' show payloads

Usage: grep [options] pattern cmd

Grep the results of a console command (similar to Linux grep command)

OPTIONS:
    -c        Only print a count of matching lines.
    -h        Help banner.
    -i        Ignore case.
    -m <opt>  Stop after arg matches.
    -v        Invert match.
adds the -A and -B options to grep

-A arg, show arg lines after match
-B arg, show arg lines before match
example:
grep -i -A 2 Reverse show advanced
Initial import of linux-mipsle shell_bind_tcp
Added XBMC Traversal exploit
Add zero byte on the end of the /bin/sh string
Added fix URL and a few more comments. Corrected date.
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Remove spaces at EOL
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework
Merge branch 'master' of git://github.com/rapid7/metasploit-framework