Added QueueManager system, ProcessManager system. Added function write_config for better saving config.

[bariscodefxy]

Patches

• Added queue save system. (If you exit from app, queue will be saved automatically to /tmp/pardus-software-queue.tmp. When you reopen the app it will load queue from this file and install/remove processes will start.)
• Added process manager class. (This class is for getting current apt install process id by Pardus Software, and can check pid is still running.)
• Added write_config function for config saving instead of writing the code to all config save functions.

Note

This patches may have issues! We should try these before merge.

[fthaltun]

Thanks but that's not working properly

[bariscodefxy]

Thanks but that's not working properly

I know I'm still making changes.