Cleanup project, update builds, fixes

[Olympic1]

Problem

I wanted to prepare CKAN for .NET 5.0, and some other stuff I'm working on, but I coudn't open the project in VS.

Cause

Not sure what exactly, but I traced it back to CKAN.Core. Something was probably malformed in the .csproj file. I let VS recreate the file and now I can open it again.

Changes

• Enabled deterministic builds (better security)
• Upgraded Cake to 0.38.4
• Upgraded NuGet to 5.6.0
• Upgraded Cake tools and addins
• Added vars for build versions (now we only change 2 values instead of 15)
• Fixed .csproj files
• Removed bootstrap packages from GUI and consoleUI (we don't use an installer)
• Fixed error with ILRepack @HebaruSan (Issue) - (Culprit)
• Migrated NuGet packages from packages.config to PackageReference (More info)
• Fixed links for reporting issues
• Removed duplicate images from zh-CN.resx file (400 kB saved)

NOTES:

• The PackageReferences will create obj folders outside _build but currently you can't change their output path.
• I upgraded netkan.exe to use CommandLineParser v2.8.0 but the CmdLine still uses the old one. I'm currently updating it but have to rewrite some stuff.

[HebaruSan]

Huh, this builds fine in a mono:latest (6.8.0) image.

$ docker pull mono:latest
$ docker run -it --rm --entrypoint bash mono:latest
# apt update && apt install git
# git clone https://github.com/KSP-CKAN/CKAN.git
# cd CKAN/
# git remote add Olympic1 https://github.com/Olympic1/CKAN.git
# git fetch Olympic1
# git checkout -b update/builds Olympic1/update/builds
# ./build

No idea why the automated builds say they're missing reference assemblies.

[HebaruSan]

Something in this created a bunch of obj folders outside of the _build directory:

$ ls -d */obj
Cmdline/obj  ConsoleUI/obj  Core/obj  GUI/obj  Netkan/obj  Tests/obj

This broke the compile when I switched to another branch. Should get those back into _build.

[Olympic1]

No idea why the automated builds say they're missing reference assemblies.

.NET v4.8 is only supported since mono 6.6.0. .NET v4.7.2 is supported since mono 6.0.0
We need to keep using v4.5 to support mono 5.20 because their cross-platform support still doesn't work.

Something in this created a bunch of obj folders outside of the _build directory:

Those are the NuGet PackageReferences, I was looking into getting that into the build folder but that isn't possible atm

[HebaruSan]

The copyright symbol thing isn't a big deal, but we can't make netkan error out without a file parameter.

[HebaruSan]

Thanks!

[DasSkelett]

Can you squash these commits before merge? Rebase commits à la "Merge branch 'master' into ..." are always a bit confusing in the commit history.

[DasSkelett]

Let's hope Mono gets its stuff together and restores cross-platform compatibility soon. Would be nice to update the rest too.
Anyways, thanks a lot for that!