Max duration config for camp lured pokestop

[showei]

Description: [Maybe add a max time limit config for camp lured pokestop? Some pokestops just lured 24/7, the bot shouldn't just stay there forever even without any balls (or not?)]

Version: [0.6.0]

Operating System: [Mac OS 10.11.6]

Java version: [java version "1.8.0_92"]

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