adds expression: true for attributes supported by turbo

lib/carto/torque-reference.js

@@ -294,7 +294,8 @@ var _mapnik_reference_latest = {
                 "type": "color",
                 "default-value": "rgba(128,128,128,1)",
                 "default-meaning": "gray and fully opaque (alpha = 1), same as rgb(128,128,128)",
-                "doc": "Fill color to assign to a polygon"
+                "doc": "Fill color to assign to a polygon",
+                "expression": true
             },
             "fill-opacity": {
                 "css": "polygon-opacity",
@@ -402,13 +403,15 @@ var _mapnik_reference_latest = {
                 "default-value": "rgba(0,0,0,1)",
                 "type": "color",
                 "default-meaning": "black and fully opaque (alpha = 1), same as rgb(0,0,0)",
-                "doc": "The color of a drawn line"
+                "doc": "The color of a drawn line",
+                "expression": true
             },
             "stroke-width": {
                 "css": "line-width",
                 "default-value": 1,
                 "type": "float",
-                "doc": "The width of a line in pixels"
+                "doc": "The width of a line in pixels",
+                "expression": true
             },
             "stroke-opacity": {
                 "css": "line-opacity",
@@ -657,7 +660,8 @@ var _mapnik_reference_latest = {
                 "css": "marker-fill",
                 "default-value": "blue",
                 "doc": "The color of the area of the marker.",
-                "type": "color"
+                "type": "color",
+                "expression": true
             },
             "allow-overlap": {
                 "css": "marker-allow-overlap",