Merge branch 'release/0.7.1' into development
#65 Try to use global language by default, if regional language is missing (EnUs is missing). Raise error, if language not supported. Some I18n refactorings.
#66 Remove all warnings in gem. (ruby -w)
#67 Add regional languages aliases in README.
#67 Fix README.
#67 Fix README.
#67 Fix README.
Bump 0.8.0. Update Changelog.
Merge branch 'release/0.8.0'