Support new directory structure overlapped over the previous one.

Update PackageManager to scan the new paths successfully. Dependencies fetched using the previous way will be normally ignored and left lingering around.

Fetch packages one directory deeper.

[Recipe] Added error messages for SDL malformed dependency name.

Merge pull request #702 from MartinNowak/ddox_tool ...

allow to specify ddox tool

Remove unused code that throws a warning on DMD 2.069.0-b2.

Fix target type inheritance for configurations in the SDL recipe parser.

fix gdc/ldc flags for ddox/docs ...

- it seems that gdc cannot currently generate a
  single json file with all output though
- remove dummy doc files after as postBuildStep

allow to specify ddox tool ...

- can be used to customize the ddox tool (and it's output)
- assumes similar commands/behavior

Fix compilation on old compilers.

Don't pass -unittest to dependencies when performing a test build. Fixes #640.

dustmite: Use relative paths for path based dependencies. ...

Absolute paths seem like they work, but dustmite will then not be able to reduce the path based dependency, because the one from the source folder will be referenced.

Fix "dub dustmite" for packages with path based dependencies. Partial fix for #240. ...

This properly adjusts the path based dependencies of the root package. If other packages in the dependency tree have path based dependencies, this still won't work.

Fix "dub dustmite" when no explicit compiler/arch is given.

better support concurrent fetch of package ...

- other dub might have already released the lock
  leading to another (failing) fetch of a package

Merge pull request #700 from MartinNowak/fix_message ...

mentions wrong --data-format argument

fix wording of remove-local log message

mentions wrong --data-format argument

Fix error message when running DUB on a folder with no package. Fixes #696.

fix #674 - cache needs to be locked for concurrent dub runs ...

- implement lockFile/tryLockFile using mkdir
- use lockFile to synchronize package download

Merge pull request #692 from D-Programming-Language/faster-local-versions ...

Implement a commit hash based cache of local package versions.

Work around quadruple search requests being executed. See #663.

Merge pull request #663 from MartinNowak/feat663 ...

A feature like `cargo search`

left justify package name and version

implement search command ...

- queries all package suppliers and outputs any found package

Only cache versions on Windows.

Implement a commit hash based cache of local package versions.

Implement atomicWriteJsonFile. ...

Writes to a temp file and then replaces (delete+rename) the target file, so that it always contains complete and valid contents.

LDC 0.16.0 removed the -noboundschecks flag, replace with -boundscheck=off which is already existing in 0.15.x

Merge branch 'master' of github.com:D-Programming-Language/dub