[Pigdin] Plugin send group pidgin-groupmsg_2.5.1-piwener2

Changes:
- No more Conversations appear when you send mass message.

Download:
- Deb i386: http://www.anhtt.net/deb/pidgin-groupmsg_2.5.1-piwener2_i386.deb
- Deb amd64: http://www.anhtt.net/deb/pidgin-groupmsg_2.5.1-piwener2_amd64.deb
- Windows: http://www.anhtt.net/dll/groupmsg-2.5.1-piwener2.dll

Note:
- For Windows, please remove previous version before installing new one.

(Source: http://www.anhtt.net)