Yes, Some Students Live in the Library (But Not Like This)
New York Univ student Steve Stanzak, who is homeless, has been sleeping in school's Bobst Library for last eight months; says his parents are not contributing to his education and that he took refuge in library after being denied adequate financial aid; NYU officials, learning of his Web site and online diary, give him free room in one of their residence halls for rest of semester; Stanzak, 20, is creative writing and music major who made dean's list last semester; says he is surprised by attention he has received after article about him appeared in campus newspaper; photo (M)