Sync zoneinfo database with tzdata2011a from elsie.nci.nih.gov

Sync zoneinfo database with tzdata2011a from elsie.nci.nih.gov

australasia:    8.20 -> 8.22
northamerica:   8.34 -> 8.39
Theory:         8.5  -> 8.6

* australasia: Simplification and gratuitous optimization of
    South Australia rules.

* northamerica: Changes to Hawaiian time history (from an article
    by Schmitt and Cox): abandoned local mean time in 1896 rather
    than 1900; used DST during World War II.

* Theory: Add section on scope of the database.