Implemented pre/post commands and --build=ddox + support "sourceFiles". ...

Other fixes:
 - fixed class Dub to work with other path than cwd
 - "files" has been deprecated in favor of "sourceFiles"
 - --build=docs also works now
 - Changed the way build flags are parsed (instead of checking every possible field for existence, all fields are iterated and their name is matched)

Reverted adding the dependency, when "dub install pkg" is called. Creating a dependency should not be done through install. Has impact on #12. ...

Additionally added the uninstall feature.

Added documentation to InstallLocation.

add sourcePaths field to package.json

When the user calls install from the command line, a dependency will be added to the project's package.json. However, this will reformat that file. Should now perform more like user expectations mentioned in #12.

Fixed naming convention for enum InstallLocation and avoid reinstalling packages that are already up to date.

Renamed all the "vibe" package to "vibecompat" to avoid conflicts.

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.