* ExerciseViewer: added FXML layout for main window.
* ExerciseViewer: added initial EVMain and EVController implementations.
* Modified ExerciseViewer startup in STController and Exercise Dialog.
* Refactoring: moved JavaFX related STContext methods to EVContext.
* Added NumberCellFactory for default number formatting in table cells.
* Added FXML layout definition for Sample Panel.
* Added initial SamplePanelController.
* Added initial setup of panel controllers in EVController.
* ExerciseViewer Sample Panel: display formatted table data.
* ExerciseViewer Sample Panel: proper handling when no data available and display a hint text.
* ExerciseViewer Sample Panel Refactoring: extracted custom number cell formatting to FormattedNumberCellFactory.
* ExerciseViewer Sample Panel: use CSS for disabling bold font in table header.
* ExerciseViewer Sample Panel: completed layout.
* ExerciseViewer: added global ExerciseViewer CSS file.
* SportsTracker UI (general): use of CSS for style definitions instead inside FXML.
* SportsTracker and ExerciseViewer: added CSS class tabpane-bordered for bordered TabPanes.
* ExerciseViewer Sample Panel Refactoring: extracted common panel functions to AbstractPanelController.