add baseModule drawFramework step

- after several failed attempts at getting cartesian
  subplot creation/update/removal into the Cartesian.plot
  (like the other base plot module), I decide to go with a less
  ambitious refactoring where a drawFramework update step
  is added to the main Plotly.plot code path
- Main reason: several layout components require the cartesian
  framework to be present in order to work properly.

src/plot_api/plot_api.js

@@ -154,6 +154,24 @@ Plotly.plot = function(gd, data, layout, config) {
 
     var oldmargins = JSON.stringify(fullLayout._size);
 
+    // draw framework first so that margin-pushing
+    // components can position themselves correctly
+    function drawFramework() {
+        var basePlotModules = fullLayout._basePlotModules;
+
+        for(var i = 0; i < basePlotModules.length; i++) {
+            if(basePlotModules[i].drawFramework) {
+                basePlotModules[i].drawFramework(gd);
+            }
+        }
+
+        return Lib.syncOrAsync([
+            subroutines.layoutStyles,
+            drawAxes,
+            Fx.init
+        ], gd);
+    }
+
     // draw anything that can affect margins.
     // currently this is legend and colorbars
     function marginPushers() {
@@ -227,6 +245,11 @@ Plotly.plot = function(gd, data, layout, config) {
         }
     }
 
+    // draw ticks, titles, and calculate axis scaling (._b, ._m)
+    function drawAxes() {
+        return Plotly.Axes.doTicks(gd, 'redraw');
+    }
+
     // Now plot the data
     function drawData() {
         var calcdata = gd.calcdata,
@@ -279,15 +302,6 @@ Plotly.plot = function(gd, data, layout, config) {
         return Plots.previousPromises(gd);
     }
 
-    // draw ticks, titles, and calculate axis scaling (._b, ._m)
-    function drawAxes() {
-        Lib.syncOrAsync([
-            subroutines.layoutStyles,
-            function() { return Plotly.Axes.doTicks(gd, 'redraw'); },
-            Fx.init,
-        ], gd);
-    }
-
     // An initial paint must be completed before these components can be
     // correctly sized and the whole plot re-margined. gd._replotting must
     // be set to false before these will work properly.
@@ -309,12 +323,13 @@ Plotly.plot = function(gd, data, layout, config) {
 
     Lib.syncOrAsync([
         Plots.previousPromises,
+        drawFramework,
         marginPushers,
         marginPushersAgain,
         positionAndAutorange,
         subroutines.layoutStyles,
-        drawData,
         drawAxes,
+        drawData,
         finalDraw
     ], gd, cleanUp);
 

src/plots/cartesian/index.js

@@ -37,8 +37,6 @@ exports.plot = function(gd, traces, transitionOpts, makeOnCompleteCallback) {
         calcdata = gd.calcdata,
         modules = fullLayout._modules;
 
-    updateSubplots(gd);
-
     if(!Array.isArray(traces)) {
       // If traces is not provided, then it's a complete replot and missing
       // traces are removed
@@ -151,7 +149,7 @@ exports.clean = function(newFullData, newFullLayout, oldFullData, oldFullLayout)
     }
 };
 
-function updateSubplots(gd) {
+exports.drawFramework = function(gd) {
     var fullLayout = gd._fullLayout,
         subplotData = makeSubplotData(gd);
 
@@ -178,7 +176,7 @@ function updateSubplots(gd) {
         // so they end up on top of the rest
         plotinfo.draglayer = joinLayer(fullLayout._draggers, 'g', subplot);
     });
-}
+};
 
 function makeSubplotData(gd) {
     var fullLayout = gd._fullLayout,