Article and Challenge objects used as parameters for database related methods
Unused instructions removed: the queries to the database are now made using prepared statements
Fix warning on declaration of SmartyHackademic::assign: incorrect number of parameters
Fix warnings on non-static methods called statically
UserScore objects used as parameters for database-related methods
Merge pull request #83 from pchaigno/fix-warnings

Fix for a few strict standards warnings
Merge pull request #80 from pchaigno/objects-as-parameters

Objects as parameters for database related methods