add hemtt support, major refactor

- no longer supports server events
- can now more easily build using hemtt
- extension vastly improved in both structure and functionality
- tested on listen server
- includes schema change

addons/main/functions/fn_getSettings.sqf

@@ -0,0 +1,27 @@
+addMissionEventHandler ["ExtensionCallback", {
+	params ["_extension", "_function", "_data"];
+	if !(_extension isEqualTo "AttendanceTracker") exitWith {};
+	if !(_function isEqualTo ":GET:SETTINGS:") exitWith {};
+
+	_dataArr = parseSimpleArray _data;
+	diag_log format ["AT: Settings received: %1", _dataArr];
+	if (count _dataArr < 1) exitWith {};
+
+	private _settingsJSON = _dataArr select 0;
+	private _settingsNamespace = [_settingsJSON] call CBA_fnc_parseJSON;
+	{
+		ATNamespace setVariable [_x, _settingsNamespace getVariable _x];
+	} forEach (allVariables _settingsNamespace);
+	ATDebug = ATNamespace getVariable "debug";
+	ATUpdateDelay = ATNamespace getVariable "dbUpdateInterval";
+	// remove last character (unit of time) and parse to number
+	ATUpdateDelay = parseNumber (ATUpdateDelay select [0, count ATUpdateDelay - 1]);
+	
+
+	removeMissionEventHandler [
+		"ExtensionCallback", 
+		_thisEventHandler
+	];
+}];
+
+"AttendanceTracker" callExtension ":GET:SETTINGS:";