Allow missing type parameters to work with cli

[heironimus]

i18n-tasks missing -tdiff was ignoring the type field

[heironimus]

I fixed the Rubocop warnings I introduced. The others are on code that is quite old, so something changed in the build process. I'm hesitant to change them without knowing more context. They are all of the form Style/StderrPuts: Use warn instead of $stderr.puts. It seems reasonable to change to warn but I would prefer someone else's thoughts before I change.

The rbx build is also failing with the following: I'm glad to try to help, but I'm not familiar with Travis.

The command "eval bundle install --without debug --path=${BUNDLE_PATH:-vendor/bundle} " failed. Retrying, 2 of 3.
Ignoring json-1.8.6 because its extensions are not built. Try: gem pristine json --version 1.8.6
Ignoring psych-2.0.17 because its extensions are not built. Try: gem pristine psych --version 2.0.17
Ignoring racc-1.4.14 because its extensions are not built. Try: gem pristine racc --version 1.4.14
Ignoring rubinius-melbourne-3.9 because its extensions are not built. Try: gem pristine rubinius-melbourne --version 3.9
Ignoring rubysl-bigdecimal-2.0.2 because its extensions are not built. Try: gem pristine rubysl-bigdecimal --version 2.0.2
Ignoring rubysl-curses-2.0.1 because its extensions are not built. Try: gem pristine rubysl-curses --version 2.0.1
Ignoring rubysl-digest-2.0.8 because its extensions are not built. Try: gem pristine rubysl-digest --version 2.0.8
Ignoring rubysl-etc-2.0.3 because its extensions are not built. Try: gem pristine rubysl-etc --version 2.0.3
Ignoring rubysl-fcntl-2.0.4 because its extensions are not built. Try: gem pristine rubysl-fcntl --version 2.0.4
Ignoring rubysl-io-console-2.0.0 because its extensions are not built. Try: gem pristine rubysl-io-console --version 2.0.0
Ignoring rubysl-nkf-2.0.1 because its extensions are not built. Try: gem pristine rubysl-nkf --version 2.0.1
Ignoring rubysl-openssl-2.9 because its extensions are not built. Try: gem pristine rubysl-openssl --version 2.9
Ignoring rubysl-pty-2.0.3 because its extensions are not built. Try: gem pristine rubysl-pty --version 2.0.3
Ignoring rubysl-syslog-2.1.0 because its extensions are not built. Try: gem pristine rubysl-syslog --version 2.1.0
Ignoring rubysl-zlib-2.0.1 because its extensions are not built. Try: gem pristine rubysl-zlib --version 2.0.1
fatal: Not a git repository (or any of the parent directories): .git

[glebm]

Thanks, looks good! I'll fix travis and rubocop errors after merging this