Preparing dub select command. dub select will select the currently used versions and write them to a file, so that dub can later use this information to rebuild this exact state. This will also be used to override dependencies with either branch versions or not matching versions (to resolve conflicts). (All of this if to be implemented). ...

Other changes:
- Added Version.UNKNOWN, which could be later used for undetermined package versions instead of ~master.
- Added Dependency to/fromJson.
- Added Dependency alias "*" for ">=0.0.0".

Removing superfluous try-catch around dub.remove.

Cleaning up exception handling for dub remove and not catching Throwable somewhere else than commandline.d.

Fix handling of the --local switch. Fixes #259. ...

--local was erroneously doing the same as --system.

Support --combined and --force flags for "dub test". Fixes #247.

Add --force-remove switch and reimplement PackageManager.remove. ...

remove() now first checks for untracked files and leaves the package untouched if it finds some and no force_remove is supplied. This means that after the user gets an error concerning untracked files, it's possible to rerun dub with --force-remove to remove the package cleanly.

Add proper documentation for the "dub test" command. Fixes #83.

Silence the "Checking dependencies" message on startup. Fixes #221.

Fix handling of remaining command line arguments (broken by previous commit).

Error out when excessive command line arguments starting with "-" are encountered.

Remove redundant dependency tree rebuilds.

Determine the version of the package in the root dir properly instead of assuming ~master.

Fix the check and error message for an existing DUB package in the selected root.

Don't try to determine the default configuration before downloading all dependencies. Fixes #213.

Deprecate the "visuald-combined" generator.

Fixed typos.

Implement individual building of dependencies.

Add "release-nobounds" build type. Fixes #141.

Add support for "add-local" without version name.

Mention support for the "http_proxy" variable.

Hide deprecated commands.

Fix DescribeCommand to check dependencies when --nodeps is not given.

Use an existing "unittest" configuration for "dub test" by default.

Add back version output for --help and improve SemVer conversion of the GIT describe output.

Change order of command class declarations to match their order in the help screen.

Let --nodeps work for any command of the build/generate category.

Remove log message previously used for debugging.

Fix running "dub test" on an explicitly named package.

Implement the "test" command.

Tweak help screen formatting and add a few short options.