Fixing 'dub fetch xyz --version=a.b.c', the latest version was fetched instead of the specified. ...

The problem was that Dependency("1.0.0") != Dependency("==1.0.0") or Dependency(Version("1.0.0")). Similar to the branches, not specifying a comparison operator assumes identical version required.

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".

Fixing serializeToJson for structs/classes with to/fromJson to/fromString.

Removing not needed check for git version when installing a package from the registry.

Not catching Throwable when metadata is fetched. ...

Documentation updated.

Removing superfluous try-catch around dub.remove.

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

Fix automatic removing of packages. Path's created for directories were missing a ending slash '/'.

Fixing Path.relativeTo for directories, a Path whith endsWithSlash==true had this property stripped, when made relative to another Path.

Fix "dub --rdmd" build everything at once. See #255. ...

Since RDMD already builds everything at once, this would be useless
work and many dependencies don't have the required
mainSourceFile, so that it would make the compilation fail.

Properly handle mainSourceFile for --rdmd. Fixes #263.

Silence debugging log message

Also warn about using certain "buildOptions" in addition to "dflags".

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

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

Tag version 0.9.21.

Merge branch '0.9.21'

Following rubygems version specification for approximate version more closely.

Fix compilation on 64-bit systems.

Improve wording.

Prepend an explicit .\ when executing executables in relative paths on Windows, too. ...

Sometimes the wrong executable was picked up for "dub run" or "dub test".

Implemented ~>1.3.5 version specifier similar to what rubygems are doing.

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

Don't downward inherit Have_* versions and only partially string import paths. ...

This change allows library builds to be reused for multiple dependees in most situations. String import paths are now only downwards inherited for packages that already have string import paths defined.

Add the target platform to the .dub/build/* cache folders. ...

Enables sharing of the same package folders for different platforms.

Fix typo.

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.

Warn when using -m32/-m64 directly.

Improve error messages for errors during package removal.

Improve error message in case of missing packages.

Fix unit tests to use lower case package names.