rtabmap: refining neighbor links uses computeIcpTransform() instead of computeTransform() (to ignore Visual registration, which adds more errors most of the time). When database is in RAM, we can close under a different name than the one used when the database was loaded.

Tango: Added Append Mode option (only start a new map after being localized, default true) and the old map is still shown for convenience until localization. Increased minInliers to 25. Increased ICP correspondenceRatio to 0.5. Decreased time to open a database. Saving doesn't close the database anymore and overwrite only if we save with the same name. Removed ICP refining from standard optimization.

corelib/include/rtabmap/core/RtabmapThread.h

@@ -82,8 +82,14 @@ public:
 	void setDataBufferSize(unsigned int bufferSize);
 	void createIntermediateNodes(bool enabled);
 
-	// this will delete rtabmap object if set
-	void close(bool databaseSaved);
+	/**
+	 * Close rtabmap. This will delete rtabmap object if set.
+	 * @param databaseSaved true=database saved, false=database discarded.
+	 * @param databasePath output database file name, ignored if
+	 *                     Db/Sqlite3InMemory=false (opened database is
+	 *                     then overwritten).
+	 */
+	void close(bool databaseSaved, const std::string & databasePath = "");
 
 protected:
 	virtual void handleEvent(UEvent * anEvent);