Make the bin/jsx source and output directories configurable.

grunt/config/jsx/jsx.js

@@ -6,7 +6,9 @@ var rootIDs = [
 
 var debug = {
   rootIDs: rootIDs,
-  configFile: "grunt/config/jsx/debug.json"
+  configFile: "grunt/config/jsx/debug.json",
+  sourceDir: "src",
+  outputDir: "build/modules"
 };
 
 var test = {
@@ -14,12 +16,16 @@ var test = {
     "test/all.js",
     "**/__tests__/*.js"
   ]),
-  configFile: debug.configFile
+  configFile: debug.configFile,
+  sourceDir: "src",
+  outputDir: "build/modules"
 };
 
 var release = {
   rootIDs: rootIDs,
-  configFile: "grunt/config/jsx/release.json"
+  configFile: "grunt/config/jsx/release.json",
+  sourceDir: "src",
+  outputDir: "build/modules"
 };
 
 module.exports = {

grunt/tasks/jsx.js

@@ -9,8 +9,8 @@ module.exports = function() {
 
   var args = [
     "bin/jsx",
-    "src",
-    "build/modules"
+    config.sourceDir,
+    config.outputDir
   ];
 
   var rootIDs = expand({