Ignore IntelliJ '.idea' metadata folder.
Support war packaging.
Make options.packaging and options.type parameters the same parameter. Allow use of 'war' or 'jar' on packaging parameter directly, instead of through type parameter.
Add documentation for packaging, type, classifier, snapshot, file and goal options.
Fix artifact file extension when deprecated options.type parameter is used.
Refactor parameter override so options.type overrides options.packaging in one place.
Refactor parameter override so options.type overrides options.packaging in one place.
Merge pull request #1 from qualidafial/develop

Add support for war packaging, and missing documentation for options.