Added method to get all entries in a table from the database

I added a method named selectAllRowsInTable(Class<?> extends
AbstractTableEntry) to get all the rows in the table corresponding to
the class passed in (so, if you pass in User.class, you'll get the list
of all users back).
Merge branch 'master' of https://github.com/nickAroberts/cap-4710-project.git