Fix for #18
add a possibility to filter invalid packages

Change-Id: I87ab464c351406262bf1a4842bfad4517ad0bf3b
Improve README formatting

Change-Id: I97f57f4344ca0af7e19edb63eedd375902d821cd
Add possibility for ICMP burst limits

Change-Id: I39b7b5c471d0f5a4346d916e440fb3a8de984ffb