* Rakefile: turn on verbose mode
* lib/phony/trunk_code.rb : Ignore nil ivar
* lib/phony/vanity.rb : Remove warning
* spec/lib: Remove warning about possible void context

Changing from `should ==` to `should eql` is a possible fix.

Another way to write it is `should be ==`.
* Remove unused variables
* Ensure ambiguous syntax doesn't emit warnings
* lib/phony/vanity.rb : Remove duplicated range for character class
Merge pull request #147 from franckverrot/warnings-enabled

Verbose mode and warning fixes