a lot!!! of changes

added main menu
added debug display
many debug widgets for plotting live data
worked on android live sensors
added offline-data sensor feeding
some dummy data sensors
worked on the map display
added ui debug for grid-points, particles and weights
added a cool dude to display the estimation
added real filtering based on the Indoor components
c++11 fixes for android compilation
online and offline filtering support
new resampling technique for testing
map loading via dialog

ui/Icons.h

@@ -0,0 +1,90 @@
+#ifndef ICONS_H
+#define ICONS_H
+
+#include "../misc/fixc11.h"
+
+#include <QIcon>
+#include <QImage>
+#include <QPainter>
+#include <QRgb>
+
+#include <QtSvg/QSvgRenderer>
+
+#include <unordered_map>
+
+class Icons {
+
+public:
+
+
+	static const QPixmap& getPixmap(const std::string& name, const int size = 32) {
+
+		// caching
+		static std::unordered_map<std::string, QPixmap> cache;
+
+		// try to get the image from the cache
+		const std::string cacheKey = std::to_string(size) + name;
+		auto it = cache.find(cacheKey);
+
+		// not in cache?
+		if (it == cache.end()) {
+
+			// build
+			const QColor fill = Qt::transparent;
+			const std::string file = "://res/icons/" + name + ".svg";
+			QSvgRenderer renderer(QString(file.c_str()));
+			QPixmap pm(size, size);
+			pm.fill(fill);
+			QPainter painter(&pm);
+			renderer.render(&painter, pm.rect());
+
+			// add to cache
+			cache[cacheKey] = pm;
+
+		}
+
+		// done
+		return cache[cacheKey];
+
+	}
+
+	static const QPixmap& getPixmapColored(const std::string& name, const QColor color, const int size = 32) {
+
+		// caching
+		static std::unordered_map<std::string, QPixmap> cache;
+
+		// try to get the image from the cache
+		const QString hex = color.name();
+		const std::string cacheKey = hex.toStdString() + "_" + std::to_string(size) + "_" + name;
+		auto it = cache.find(cacheKey);
+
+		// not in cache?
+		if (it == cache.end()) {
+
+			// copy
+			QPixmap colored = getPixmap(name, size);
+			QPainter painter(&colored);
+			painter.setCompositionMode(QPainter::CompositionMode_SourceIn);
+			painter.fillRect(colored.rect(), color);
+			painter.end();
+
+			// add to cache
+			cache[cacheKey] = colored;
+
+		}
+
+		// done
+		return cache[cacheKey];
+
+	}
+
+	static QIcon getIcon(const std::string& name, const int size = 32) {
+
+		return QIcon(getPixmap(name, size));
+
+	}
+
+};
+
+
+#endif // ICONS_H