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

Merge pull request #336 from sinkuu/fix_subpkg_isuptodate ...

Fix isUpToDate for sub-packages

Fix isUpToDate for sub packages

Only execute Windows specific unit tests on Windows.

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

Do not store sub packages of "add-local" packages and fix removeLocalPackage.

Various improvements. Fixes #268. ...

- Treat all package paths as ending with a slash to fix path comparison issues
 - Avoid re-reading all packages twice when building, see also #325.
 - Fix bogus "License in subpackage different" warning

Support :subpackage shorthand syntax. Fixes #315. ...

This works for dependencies, as well as for referencing sub packages on the command line.

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.

Allow empty path nodes. Fixes #177.

Display the build date for "dub -h".

Ignore any noise on stdout when reading back the platform information.

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

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

Fix orphan format specifier.

Merge pull request #324 from opticron/master ...

Compilers: Add arch support for gdc

Compilers: Add arch support for gdc

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

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

Merge pull request #320 from MartinNowak/fixNoDepBuild ...

fix issue with missing dub.selections.json

fix issue with missing dub.selections.json ...

- the dub.selections.json file was no longer generated
  for packages without dependencies

- this lead to an error when checking for the timestamp
  of the selections file later on

- an alternative fix would be to ignore the timestamp
  when no selections file exists

Merge pull request #306 from ColdenCullen/master ...

Allow System and Local flags on all commands

Added old --system and --local flags back, but marked as deprecated.

Switched to '--cache=x' param type for package fetching.

Add hint to run "dub <cmd> -h" when usage errors occur.

Removed 'Wide' from PlacementLocation member names.

Merge branch 'upstreammaster' ...

Conflicts:
	source/dub/project.d

Implement support for $ROOT_PACKAGE_DIR and $<PACK_NAME>_PACKAGE_DIR variables. Fixes #260. ...

PACK_NAME must be all uppercase and dashes (-) must be replaced by underscores (_).

Don't run postBuildCommands for up to date targets.

Process variables for pre-/postGenerateCommands.