Improve JSON parser error format. Fixes #317. ...

Errors are now displayed as "file(line): Error: message".

Merge branch '0.9.22' ...

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

Fix trying to copy copyFiles where source==destination.

create symlinks instead of copying cached build files

Removed extra spaces between words

Ensure all files end with a newline

Use tabs in all JSON and D files

Removed trailing whitespace

Only execute Windows specific unit tests on Windows.

Avoid the UNC path root "\\" to be part of a relative path. Fixes #302.

Allow empty path nodes. Fixes #177.

Enable line number display for JSON errors and improve error messages. See #317 and #325.

Reverse mkdir fix, as it was already done.

Fixed bug where Path was used for URL on Windows.

Fixed build bugs on Windows. ...

* Fixed output dir not being created on build complete.
* Fixed '/' being added to the front of Windows absolute paths.

Remove unused prototype.

Use URL and Path types of vibe.d if available for better interop.

Make log parameters lazy instead of auto ref. ...

This enables passing arguments doing complex computations for debug messages without worrying about impacting execution speed when debug logging is disabled.

Disable log output during "dub describe" to ensure only JSON gets written. See #221. ...

Note that JSON will only get written when no errors occur. Otherwise the output will be the usual error messages.

Correct copyright notices.

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

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

Add unit test for Path.toNativeString() w.r.t. endsWithSlash() and fix Path().toNativeString() on Posix.

toNativeString() now returns "." on Windows for relative empty paths when m_endsWithSlash is false.

Fix listing of directories containing invalid symbolic links.

Work around DMD associative array bug. Fixes #179.

Fix Path.toNativeString() for empty paths (was missing the ending slash).

Fix duplicate file entries in generated VisualD projects. Fixes #168. ...

SourceFile.toHash was necessary for AAs to do anything useful and build==true files now have precedence over build==false files.

Fix warning that for some reason only occurs on some systems...

Improve the Appender workaround.