Refine time discount.
clean disk.
.
Merge branch 'develop' into news
News Ranker update.
News feature refactor.
Package management.
merge
Merge branch 'news' into develop

Conflicts:
	data
	spellCheckTestData/aspell.dat
	spellCheckTestData/big.text
	spellCheckTestData/missp.dat
	spellCheckTestData/test1.text
	spellCheckTestData/test2.text
	spellCheckTestData/wikipedia.dat
	spellCheckTestData/words
	src/edu/nyu/cs/cs2580/handler/NewsQueryHandler.java