Modify copyFiles to allow recursive copying of directories with contents, if directory name is specified in file list (or matched by wildcard)

Implement copyDirs parameter, similar to copyFiles - should recursively copy directory content to destination

Remove PackageManager argument from createProjectGenerator(). ...

The argument is also removed from all Generator sub classes.

Remove obsolete field from BuildGenerator.

Merge branch '0.9.22' ...

Conflicts:
	source/dub/dub.d
	source/dub/generators/build.d
	source/dub/generators/generator.d
	source/dub/package_.d

Avoid exception in up-to-date check for non-existent source files and trigger rebuild instead.

Avoid '/', '\\' and ':' in build path when --compiler specifies a complex path. Fixes #412.

Various small fixes ...

- fix computeBuildID for --compiler=/my/path;
- dub compiled with ldc tried to invoke ldc as default binary instead of ldc2;
- dmd: Don't generate anything;
- gdc: Do not link, only generate an object;

Improve warning message when --rdmd is used without a "mainSourceFile". ...

See also #396.

Step one of abstracting package description format

create symlinks instead of copying cached build files

Implement separate linking on gdc

Fix output flags for compilers != dmd

Added singleFile support

Add a --temp-build switch to force building in the TEMP folder. Fixes #294.

Removed trailing whitespace

Use "dub.json" instead of "package.json" in documentation

Fix isUpToDate for sub packages

Fix up-to-date check for intermediate dependencies. ...

In a dependency chain with static libraries b and c (a->b->c), changing something in c didn't trigger a rebuild of b, but only of c and a.

Display the compiler binary with invoking the compiler for separate compilation. See #326.

Do not build dependencies of static libraries. Fixes #316.

Add the --build-mode switch to control how the compiler and linker are invoked.

Don't run postBuildCommands for up to date targets.

Print the version of each target during the build.

Create target directory if necessary. Fixes #261.

Add the compiler frontend version to the build hash. Fixes #284.

Rebuild packages when dub.json (all packages) or dub.selections.json (root package) changed.

Run executables _after_ generation has finished. ...

In particular, the generated application is run after the copyFiles have been placed. This is a fix for a regression that was introduced after the last release version.

Collect build targets after running preGenerateCommands. Fixes #144. ...

This enables used generated source files without listing each of them manually. Now a single "sourcePaths" entry is sufficient.

Implement user/system wide overriding of certain package version ranges. ...

What is still missing is a command line interface for conveniently setting the overrides.