Add support for Battleye script notifications
Merge pull request #95 from 82ndab-Bravo17/release-1.10

[Battleye] Add support for Battleye script notifications

Fires a new event : EVT_BATTLEYE_SCRIPTLOG
[SFTP] add authentication using private RSA or DSA key file

- known_hosts and private key files can be set in the plugin config file
- add optional config file
Merge branch 'release-1.10' of https://github.com/BigBrotherBot/big-brother-bot into release-1.10