WIP: Moved sources int src/, separated most of the source code from Perl.

The XS was left only for the unit / integration tests, and it links
libslic3r only. No wxWidgets are allowed to be used from Perl starting
from now.

src/slic3r/Utils/PresetUpdater.hpp

@@ -0,0 +1,42 @@
+#ifndef slic3r_PresetUpdate_hpp_
+#define slic3r_PresetUpdate_hpp_
+
+#include <memory>
+#include <vector>
+
+namespace Slic3r {
+
+
+class AppConfig;
+class PresetBundle;
+
+class PresetUpdater
+{
+public:
+	PresetUpdater(int version_online_event);
+	PresetUpdater(PresetUpdater &&) = delete;
+	PresetUpdater(const PresetUpdater &) = delete;
+	PresetUpdater &operator=(PresetUpdater &&) = delete;
+	PresetUpdater &operator=(const PresetUpdater &) = delete;
+	~PresetUpdater();
+
+	// If either version check or config updating is enabled, get the appropriate data in the background and cache it.
+	void sync(PresetBundle *preset_bundle);
+
+	// If version check is enabled, check if chaced online slic3r version is newer, notify if so.
+	void slic3r_update_notify();
+
+	// If updating is enabled, check if updates are available in cache, if so, ask about installation.
+	// A false return value implies Slic3r should exit due to incompatibility of configuration.
+	bool config_update() const;
+
+	// "Update" a list of bundles from resources (behaves like an online update).
+	void install_bundles_rsrc(std::vector<std::string> bundles, bool snapshot = true) const;
+private:
+	struct priv;
+	std::unique_ptr<priv> p;
+};
+
+
+}
+#endif