ripper-tags 0.4.0

• Recognize methods defined by delegate, def_delegator, and def_delegators.
• Recognize constants defined within arrays or hashes.
• Support -L|--input-file option to read the list of paths from a file.
• Add --ignore-unsupported-options to avoid crashing if some options were passed that ripper-tags doesn't recognize.
• Support -n|--excmd=number option.
• Support --fields=n option for vim formatter to include the line:N field.
• Drop Ruby 1.8 compatibility because it's getting hard to maintain a test suite running against it.