Apply patch by ketmar: remove comma expressions and fix property syntax. ...

Also contains two minor additional style fixes.

append a newline when writing dub.selections.json

Add "packageManager" property to Project.

Untangle Package and PackageInfo. See #403.

Step one of abstracting package description format

prevent code from searching file system for the package file multiple times

Fix lookup of sub packages from within sub packages of the same package. Fixes #357. ...

When the root package was a sub package, any reference to another sub package was looked up relative to the root (sub) package instead of its base package.

Fix possible range violation error when accessing the upgrade cache.

Cache the results for upgrade suggestions. ...

The same results are not reused for one day instead of querying the registry every time. Note that this already used to be the case some time ago.

Add a warning for dependency specifications that mismatch the version selections. Fixes #333.

Resolve sub packages when loading path based dependencies. Fixes #347.

Avoid redundant loading of packages and remove PackageManager.getTemporaryPackage.

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

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

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 (_).

Added support for fetching to any location, now need to add support for finding packages in other locations.

*Rally* only overwrite dub.selections.json if necessary.

Rename m_selectedVersions -> m_selections.

Only overwrite dub.selections.json if there are actual changes.

For "dub run", change the CWD only if non-empty. Fixes #272.

Fix path based dependencies. See #282 and #253.

Detect dependency cycles after version resolution and before configuration resolution. Fixes #280.

Fix building sub packages that depend on their own parent package.

Fix usage of the selections file (was completely ignored) and improve diagnostic output.

Avoid internal exception when loading version selections.

Rename UpdateOptions->UpgradeOptions and move it to dub.dub.

Properly support path based version selections.

Fix validating the configuration graph. ...

getTopologicalPackageList(), which was used before, could yield a different set of packages.