[Spec] Test the existing method instead
[Spec] Wrap context to share preconditions
Remove unused method #strings_file_paths
[Spec] More specs for StringsAnalyzer
[Spec] Don't allow warnings in StringsAnalyzer for fixture-backed specs
Improve error handling in StringsAnalyzer#read_plist_key
Improve error handling in StringsAnalyzer#native_dev_languages
Allow exceptions as first argument for Logger#warn

Extract #coerce_to_message out of Logger#error.
Merge pull request #17 from mrackwitz/fix/handle_missing_info_plists

[Fix] Handle missing info plists