Changes
=======
* upgrade requirejs to 2.0.4
* upgrade almond to 0.1.1
* add package_dir option to .jamrc (now you can change the default "jam" install directory system-wide or project-wide, thanks to clexit for this patch)
* don't attempt to install directories (sometimes this interferred with installing a package that had the same name)
* fix custom install paths in generated config file
* fix "jam link" when jam directory does not exist
* added -f, --force option to clean command
* added -R, --recursive option to remove command - removes any unused packages after removing the target package(s)
* remove command will now report an error if attempting to remove a package with installed dependants