removed explicit SQL commands; edited "Credit Card Account" string for better translation
Merge pull request #22 from giuseppepaoletti/develop

removed explicit SQL commands; edited "Credit Card Account" string for b...
fix typo and use less and reaable code to impl the simple logic
deleted Model_StockHistory::search function; cleaned unnecessary code
Merge pull request #26 from giuseppepaoletti/develop

deleted Model_StockHistory::search function; cleaned unnecessary code