bugFix: removed potential memory leak in updating stock price history; added function to Model_StockHistory to perform add/update price
removed explicit SQL calls in Model_StockHistory class
const ref for date and delete unnecessary include
Merge pull request #10 from giuseppepaoletti/develop

bugFix: removed potential memory leak in updating stock price history; a...
pass const ref and fix slash
pass const ref and fix slash
bugFix: removed specific windows platform macros and functions
Merge pull request #11 from giuseppepaoletti/develop

bugFix: removed specific windows platform macros and functions