Also fixed array out of bounds error on displaying histories on the quiz
summary page (problem was in Quiz.java in the getRecentQuizTakers
method).
Completely fixed the date-time issue for quizzes and histories. Removed
the unecessary dateString field in DBTables.sql, updated the database,
and updated all database code in the servlets/classes that referred to
this dateString. Everything should work now! Recently taken/created
quizzes sort by their date leveraging the Mysql DATETIME type, rather
than the String form.

Also fixed array out of bounds error on displaying histories on the quiz
summary page (problem was in Quiz.java in the getRecentQuizTakers
method).
Merge branch 'master' of ssh://github.com/amybear/quiz

Conflicts:
	build/classes/quiz/Quiz.class