Move application code for static ctor in main module ...

This code could easily mess with library users as it has
some side effects, so move it somewhere it will only affect
the binary.

Disable parallel marking within DUB

enable merging of coverage reports to account for tests

Move command line processing to a separate module.

Let "dub --build=ddox" start a local HTTP server instead of generating .html files.

Remove dub.internal.std.process compatibility code as it doesn't support browse() and the compile status on older DMD versions isn't tracked anyway.

Rename Dub.get() to Dub.fetch(). See #150.

Extend "dub init" to take an optional type argument and don't create "public"/"views" folders by default. Fixes #152. ...

The generated package.json is also improved WRT the copyright and author strings (using the current date and the local user name).

Commands: "get" -> "fetch"

Add usage notification for Run 'dub help' for usage information.

Add backwards-compatible aliases no renamed commands

Remove 'installation' references. ...

Change dub wording to stop referring package retrieval as installation, both in code and commands.

Exit when package loading fails. Fixes #145.

Fix "dub -- app args".

Always output the DUB version number when -v is specified.

Fix root package initialization for "dub describe" and add support for describing named packages.

Fix running dub from a non-package path and allow sub packages to reference their parent.

Determine default configuration *after* loading the selected sub package.

Implement building of specific packages, including sub packages.

Remove the now redundant GeneratorSettings.compilerBinary field.

Implement --root=PATH switch to override the current working directory.

Fix typo. See #122.

Use BuildOptions instead of DFlags to handle --debug=XXX flags on the DUB command line.

Fixed two small typos in Usage ouput. ...

Fixed a couple of small typos in the DUB usage message.

Only upgrade branch packages if required and never upgrade the same package twice. Fixes #118.

Improve wording of command line structure on the help screen.

Implement -debug=xyz flag.

Add support for customized build types ("buildTypes"). Fixes #78. ...

Also changes the way the $DFLAGS environment variable works: passing --build=xyz will now cause DFLAGS to be ignored.

Fix build script for missing registry.d file. Fixes #95.

Refactor code. ...

Moved and renamed RegistryPS to dub.packagesupplier, made Dependency a struct and improved code convention adherence.