-Added OpenSSL and HTTPS support

-Built-in version of the library for Windows, Android and iOS (other OSs use system one)
-Small fixes all around

scene/gui/progress_bar.h

@@ -26,22 +26,27 @@
 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
-#ifndef PROGRESS_BAR_H
-#define PROGRESS_BAR_H
-
-#include "scene/gui/range.h"
-
-class ProgressBar : public Range {
-
-	OBJ_TYPE( ProgressBar, Range );
-
-protected:
-
-	void _notification(int p_what);
-public:
-
-	Size2 get_minimum_size() const;
-	ProgressBar();
-};
-
-#endif // PROGRESS_BAR_H
+#ifndef PROGRESS_BAR_H
+#define PROGRESS_BAR_H
+
+#include "scene/gui/range.h"
+
+class ProgressBar : public Range {
+
+	OBJ_TYPE( ProgressBar, Range );
+
+	bool percent_visible;
+protected:
+
+	void _notification(int p_what);
+	static void _bind_methods();
+public:
+
+	void set_percent_visible(bool p_visible);
+	bool is_percent_visible() const;
+
+	Size2 get_minimum_size() const;
+	ProgressBar();
+};
+
+#endif // PROGRESS_BAR_H