Package should have download options
Package options must be passed as argument to downloader
Package options should be dumped if exists
Package options must be a non mandatory array and should be loaded when
exists
Repository options must be replicated on package when dist file is under
repository base dir
Add a warning for unbound constraints in the validating loader

Closes #2165
Added a new FAQ entry about unbound version constraints
Add remove command to remove a package from the list of current installed packages
Don't throw an exception if the called script is not one of the
event-scripts. This makes it possible for one to define their own
scripts like "make-release" etc.
Throw an exception if no listeners have been found for given event.
Check if a given event has registered any listeners. If not the script
is not defined in the composer.json file
Don't throw exception in the doDispatch method.
Added a new method to check if an event has any listeners registered.
documentation for http basic authentication method for repositories
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/Composer/Downloader/FileDownloader.php
added "home" command like the npm one, opens a package in your browser
some minor refactorings
tiny refactorings
escape shell args
rename command