v2.0.0.0

Sorry for the huge wait - probably should've backported fixes earlier, but this should fix a ton of the bugs people have reported and some of the feature requests!

• UI redesign (huge huge thanks to @cmot17)
• Fix issue with mods not properly installing or enabling when
  dependents were disabled
• Fix issue with extra installs (which should lower install
  speed of mods by a huge amount)
• When uninstalling, check dependencies against disabled mods
• Fix crash on failure to kill HK process
• Add ability to change locale
• Add viewing authors
• Add support for filtering mods by tag
• Use notifications for mod action, especially errors
• Add support for viewing mod repository READMEs
• Re-enable concurrent link fetching (speeds up startup significantly)
• Add WIP thumbnail support
• Change logging to use Serilog, automatically rotate logs, etc.
• Add more logging to path selection
• Add About screen