0.6.4 - Restored WebUI

[mickem]

Added back the WEB UI which is now fully working again

The WEB UI has the same functions as before but is now written in a modern framework.
It is still a bit bare bones and I have plans to add configuration wizzards to simplify configuration.

Other Fixes

• Fixed an issue where the config was not read by the installer causing the config to be reset every time you upgraded NSClient++
• Added missing symbols to releases
• Swapped versioning to use semantic versioning
• Automated version bumps

---

This discussion was created from the release Preview for 0.6.4.