Scalafix 0.3.2

See merged PRs.

• It is possible to load custom rules from source with rules = ["file:MyRule.scala"] or urls rules = ["https://gist./../.Rule.scala"].
• imports.groups = [] can now be empty, thank you @mlangc for contributing this fix!
• Named imports are no longer subsumed by wildcard imports, which could previously introduce ambiguous imports.
• imports.expandRelative = false by default. Expanded relative imports can create unused imports. If you want to expand relative imports, you may need to run scalafix twice to remove unused imports created by scalafix.
• Fixed minor ordering bugs in organize imports.