Avoid use of deprecated functions + fixed package installation.

Implemented basic multi-compiler support (with only a dmd implementation right now).

Handling missing package.json more gracefully (without a crash) + some trace log messages.

VisualD projects have some nice folders, added (string)importPath and dflags support.

Compile fix.

Custom source folders can be specified, root folder will likely cause problems, currently.

Fixed path format to native.

Using join preperation for string imports.

System libraries and additional link files are used for project generation. A postbuild copy-files command is needed in order to build successfully.

More resolved conflicts, replaced usage of PackageStore with PackageManager.

Merge branch 'master' of https://github.com/rejectedsoftware/dub ...

Conflicts:
	package.json
	source/app.d
	source/dub/dub.d
	source/dub/package_.d
resolved.

Renamed "importPath" to "importPaths" and "stringImportPath" to "stringImportPaths" - seems to be more intuitive.

Implemented "configurations"/"default" to select a platform dependent default configuration.

Mysterious compile fix for DMD 2.060.

Implemented "binaryPath".

Implemented "copyFiles".

Added support for local package definitions in package dependencies and fixed recursive dependencies.

Implemented several new commands and moved the download location to the temp folder. ...

- dub install installs a package in the user/system repository or in the current directory
 - dub uninstall is not yet implemented
 - dub add-local adds a local folder as an installed package (useful so that projects use a git cloned package instead of the github one)
 - dub remove-local removes a local folder again as an installed package

Implement basic support for user/system installed packages and local packages. ...

Also removed a lot of (caught) exceptions. The installation/uninstallation code was moved and modified to the new package manager, which is now responsible for all locally installed packages.

Various additions and fixes. ...

- Added build types "plain" and "docs"
 - Added a build field "files" for package.json
 - Fixed some possible causes for InvalidMemoryOperationErrors.
 - Build options can now be of the form "dflags-x86" and "dflags-x86-dmd"

Fully implemented support for build configurations + added build config fields "lflags", "importPath", "stringImportPath" and "versions".

Added partial support for build configurations and added some diagnostic command line flags.

Implemented basic build platform detection and extended the possibilities for platform specific fields in package.json.

Added the possibility to specify "dflags-xyz" in addition to "dflags" for platform specific flags. ...

Can be one of:
 - dflags
 - dflags-platform
 - dflags-architecture
 - dflags-platform-architecture

where platform is "windows", "linux", "posix" etc. and architecture "x86", "x86_64", "mips" etc. (the lowercase version of the predefined D versions)

Note that the platform is currently hard-coded to windows-x86

Incomplete generation of VisualD project files. Missing: project dependencies being compilable libraries and precompiled libraries as well as system installed precompiled libraries.

Initial commit (more or less the same code as used for vibe.d's vpm).