Adding populate_library_tables
Added populate_library_tables and modified dropLibTables.sql
updated populate_library_tables
Merge branch 'master' of https://github.com/g2-aj/cs304 into branch_kris

Conflicts:
	populate_library_tables.sql
fixed conflicts in populate_library_tables.sql
Merge pull request #24 from g2-aj/branch_kris

Fixed date on insertBook() and showBook().