Activity streams review comment status

During this week's i18n telecon, i'd like to see whether we can agree to 
close the following comments:

• Clarify that zone offsets in times do not indicate local time #331
   https://github.com/w3c/i18n-activity/issues/171

• Internationalize IRI in example 3
   https://github.com/w3c/i18n-activity/issues/172

• Use BCP 47 rather than RFC 5646
   https://github.com/w3c/i18n-activity/issues/173

• RFC 5646 listed as informative reference
   https://github.com/w3c/i18n-activity/issues/174

• Linking to RFC 3339 for duration is dubious
   https://github.com/w3c/i18n-activity/issues/179

• i18n-ISSUE-387: AS2.0: Section 3.2: language example issues
   https://github.com/w3c/i18n-activity/issues/43



We should also discuss the following comments:

• **Map fields become a SHOULD
   https://github.com/w3c/i18n-activity/issues/184

• Why exclude markup from name?
   https://github.com/w3c/i18n-activity/issues/178

• It should be possible to indicate the default base direction for 
natural language values
   https://github.com/w3c/i18n-activity/issues/176

• How to know the language of a natural language value when there is no 
translation?
   https://github.com/w3c/i18n-activity/issues/175




There's one more issue, for which i'm awaiting further action:

• Editorial: Suggestion for spanish translations
   https://github.com/w3c/i18n-activity/issues/177



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