Function "fishing"

To use this function, you have to be ready on fishing state, and the Start button is visible clearly on the screen

Supported flags:

• --exit=X means bot will exit after X secs if not completed, no matter how many loop remaining
• --shutdown shutdown your computer after bot exit
• Global flags

Test result

OS	Fishing on Mini-client 800x520	Fishing on Steam 800x480	Fishing on Steam 800x520 (v2.0.0+)
Ubuntu 18.04 (development environment)	Works perfectly	N/A	N/A
Windows 10 x64	Works perfectly	Works perfectly	Works perfectly
Windows 7 x64 (on Virtual Box)	Works perfectly	Works perfectly	Works perfectly
MacOS 10.14 High Sierra	Not work	N/A	N/A