Log Message:
Update to 0.5.4:

0.5.3 -> 0.5.4
=================
Akira TAGOH (5):
      Fix the module build on NetBSD (fixed issue#7)
      Fix format
      Add date property to language-subtag-registry.xml
      Get rid of the extra space in case word-wrapping
      Remove the language subtag registry file on dist