+Added definitions and icons for signs: W1, W13, W13a, W15, W17, W28
*Fixed text retrieval for older types of W27 and W8 signs, where the speed limit is specified in the prefab name instead of the data field
+Added separate icons for different types of signal boxes (standard, empty, skp, unknown)
*Signal boxes names no longer include [] and <> tags
*SignaBoxes are now a seperate class, not part of the Misc class
*Rotations of signal boxes are now more accurate
+Added Route class
+Added RouteRenderer
*Parts of the map rendered by different renderers are now separated into <g> groups
*Fixed signals not being parsed correctly
