Remove message about system installation of packages ...

This is no longer true, we have /var/lib/dub
Moreover, users should be familiar with this, as it's how most package managers work.

Remove long-deprecated 'install' and 'uninstall' command ...

There were deprecated before dub v1.
I stopped going up the history after 4d8f81b,
on 2013-11-13, where they were already deprecated.

Do not call Project.reinit from commandline ...

reinit is called directly when Project is instantiated. It calls PackageManager.refresh,
which re-reads all packages stored in the package directory.
If we want to make dub smarter and faster, we need to stop scanning all the packages
on disk when we have a resolved dependency tree, and move to a lazy/on-demand approach.
The first step would be to remove this call. See also #2388.

commandline: Catch Exception, not Throwable ...

So that assert errors, which are bugs in dub, get properly reported.

Deprecate once-called redundant getLatestPackage ...

getBestPackage present a more generic interface,
as long as we feed it Dependency.any.

Use Dependency.any whenever possible

Avoid needless string concat in log calls

Fix dub_test_root imports for non-all-at-once compilations (#2288) ...

Which requires a regular `dub_test_root.d` filename *and* adding
the containing directory to the importPaths.

Make `dub describe -c unittest` auto-generate dub_test_root.d if required
Except with `--annotate` for a dry run.

Add a command line option for upgrading all sub packages. ...

Allows to upgrade all path based sub packages of a package, in addition to the package itself, in one go. See also #1245 and #2284.

Allow "dub :subpackage" shortcut syntax to run a certain sub package.

Trivial: Re-use findPackageFile in commandline module

commandline: Refactor and streamline special syntaxes ...

All those special syntaxes only trigger if args.length >= 2,
so first we can nest them in a new scope, which also makes
it visually more distinct.

Additionally, the third and second cases were actually inverted:
if the third case was to pass, it means the second case couldn't
have passed (because they check present/absence of an extension,
respectively), so we can swap them and use an else-if.

The result is arguably much more readable, and highlight the fact
that if the first case (stdin) is used, the second case will.

Add support for coverage at compile-time (CTFE)

Support special test runner configuration for `dub describe` as well

Handle unittest config special case in Dub.generateProject()

Fix #1856 - enable building the special test runner config

expose the implemented describe pre/post-run cmds

fix CLI --print-builds implementation

Expand tilde in --root path

Put dustmite flags just after dustmite command and add --trace flag

Forward dub dustmite parameter -j

Forward dub dustmite parameter --strategy

Add environment variables to BuildSettings (#2121)

Add lowmem for settings

Refactor import. Url is not used directly, but path is.

Propagate the `single` option ...

before GeneratorSettings ignored this option

Trivial: Clean up trailing whitespace

Add ability to specify version specification for commandline commands ...

As mentioned in the changelog, it was not possible with all commands.
No breaking changes are expected.

improve list command

added version spec ability for remove and fetch commands, deprecate --version argument for those