Small change for MoC mode.

Hi, 

I use clyrics with MoC and the FortmaString in m
https://github.com/genomorro/clyrics/compare/trizen:master...master#fullscreen_pull_request_body is:

`FormatString = "%(a:%a \: :)%(A:\"%A\" | :)%(n:%n - :)%(t:%t:)"`

When I see mocp --info:

`Title: Leonard Cohen : "Live in London" | 5 - Everybody Knows`

Looking for that string it's complicated and in fact not very successful. I change the search string  to something more simple.

I added 2 plugins.

NOTES: 
* English isn't my native language, sorry if my writting is not good. 
* I don't use Perl, then my line of code could be better.