Autorun feature based on the type of browser

BeefStrike script is now able to send beef's commands automaticaly and
based on the browser type. The parameters of each commands can be
customize. Also, the script is no more dependant to the
beefmetasploitplugin even if it still load it for users usage. Preparing
WDbC
Merge pull request #20 from benyG/master

Autorun feature based on the type of browser