Kill and attempt streaks

[farooqkz]

Notifying players about kill streaks have been suggested several times. But as it is CTF and the goal is capturing the flag, I suggest counting both kill streaks and attempt streaks.

Examples:

• When a player has attempts in a period more than a threshold, they are on a streak. For example if shangul had 5 attempts in under 5 minutes: "shangul is on a mega attempt streak"
• When a player has too many kills without dying: "shangul is on a mega kill streak"

[farooqkz]

Closing. This was implemented and disliled by players.