Make Naksu logs more readable

• Increased the size and number of rotated log files. Now each log file can be up to 10 megs and rotation stores 5 last files.
• Removed several unnecessary periodical log entries. In some cases there will be an log entry only in case the status changes.
• Log host computer power plan settings.
• Create an unexisting ~/ktp-jako when sending log files to Abitti support.
• Updated several modules to recent versions.

Fix segfault on Linux+Wayland+Nvidia

• Fix a bug causing Naksu to stop when Exam Server install passphrase was given
  on a Linux with Nvidia proprietary display drivers

Do not use AbittiUSB version URL to test network connectivity

• Network detection uses new version URL instead of deprecated AbittiUSB URL
• Build with golang 1.19
• Upgraded vulnerable xz package
• Removed deprecated io/ioutil package

Improve error messages and fix checksum calculation

• Fix checksum calculation of zip entries
• Improve status and error messages
• Code clean-ups

Check Disk Images

• UI improvements (progress bar, messages) - thanks to @developerfromjokela
• Added/fixed some missing translations and log messages
• Check downloaded images with sha256 checksum
• Create ~/ktp on start to avoid storing first Naksu log to system temporary
  directory

Small Fixes

• Fixed broken detection of running VM
• Remove existing VM after correct install passphrase has been given
• Use https to download version numbers and images to avoid various attack types
• Fixed freezing UI on Linux
• Removed unnecessary terminal window on Windows

Fixed CPU core calculation

• Show an user-friendly message instead of plain 404 when submitting wrong install passphrase
• Prevent closing VM by Save option
• Fixed VirtualBox settings path on Linux
• Do not fail when removing locked VirtualBox system files when removing server
• Calculate host machine cores instead of threads when creating a new VM

Naksu is More Robust Than Ever

• Remove image files before installing a new server
• Communicate Naksu updates via graphical UI instead of standard output only
• Check VirtualBox version and suggest upgrade (or downgrade) if required
• Make more UI-related checks in parallel to avoid lags in the UI
• Avoid losing important log entries by reducing log spam and adjusting rotation settings

Without Vagrant

• Install VM directly to VirtualBox without Vagrant
• Retrieve images within a zip file prepared for Balena Etcher
• Get Abitti version string and image zip from a static URL
• Get Matriculation exam image zip from an URL dependent of an install passphrase
• gettext-style localisation
• Suppress some repeating log messages
• Turn automatic updates back on from UI if disabled
• Improve error message when detected Windows Hypervisor
• Improve log messages on VBoxManage errors

Fix failing network hardware queries on Windows

• Fix failing network and hardware related WMI queries (Windows)
• Fix folder name (ktp-jako instead of ktp) in log delivery popups
• Hide copy-to-clipboard button in log deliver popup if no supporting tool is found (Linux)
• Use golang 1.13 instead of 1.10 (and golang 1.11 -style module management instead of dep)