Multiinstancelinux

Feature Update.
Changelog
- Removed the misleading instruction in README.md to update the script.
- Replaced reset nth instance keybind with reset current instance keybind (because it makes a lot more sense).
- Moved rsg_reset_macro.py and instance_switch_handler.py to reset_handlers.py and instance_handlers.py respectively (because they make more sense in the context of their functionality).
- Added a pause feature to all inactive instances while switching instances.
- Updated README.md to reflect the new changes.

First release after moving from beta.
Changelog
- Added Atum and FastReset support.
- Added xdotool dependency with installation instructions.
- Faster resetting by removing the timeouts between each keystroke.
- Removed unnecessary for loops in switching instances.
- Removed storing the instance names as a list and generalizing it to the hexcodes instead.
- Added another configuration variable.