Add the ability to update libraries to new versions in the headless server

It checks the libraries on the start up. It will block the app until everyting it is ready. C

YACReaderLibraryServer/libraries_updater.cpp

@@ -0,0 +1,39 @@
+#include "libraries_updater.h"
+
+#include "yacreader_libraries.h"
+#include "data_base_management.h"
+
+
+
+LibrariesUpdater::LibrariesUpdater()
+{
+
+}
+
+void LibrariesUpdater::updateIfNeeded()
+{
+    YACReaderLibraries libraries;
+
+    libraries.load();
+
+    foreach(QString name, libraries.getNames()) {
+        QString path = libraries.getPath(name) + "/.yacreaderlibrary";
+
+        QDir d;
+
+        QString dbVersion;
+        if(d.exists(path) && d.exists(path+"/library.ydb") && (dbVersion = DataBaseManagement::checkValidDB(path+"/library.ydb")) != "")
+        {
+            int comparation = DataBaseManagement::compareVersions(dbVersion,VERSION);
+
+            if(comparation < 0)
+            {
+                bool updated = DataBaseManagement::updateToCurrentVersion(path);
+                if(!updated) {
+                    //TODO log error
+                }
+
+            }
+        }
+    }
+}