Bugfixes and Improvements

• Now when crash happens, the script both saves a screenshot and all logs in a txt file. They are put into a zip archive in the "crashes" folder. Now you can simply attach this archive to a bug report, no need to save logs manually.
• Fixed wrong format of screenshots (png instead of jpg) #109
• Merged @philip-ulrich's PR that fixes bug with the "user not found error" for valid user #106