Improve Splore build experience

clients/splore/README.md

@@ -9,8 +9,8 @@ This is a generic noms data explorer.
 
 ## Build
 
-* `./link.sh`
-* `npm install`
+* `./link.sh`  # only necessary first time, or if changes have happened in `js2`
+* `npm install`  # only necessary first time, or if deps have changed
 * `npm run build`
 
 ## Run

clients/splore/link.sh

@@ -1,4 +1,5 @@
 pushd ../../js2
+npm install
 npm run build
 ./link.sh
 popd

js2/package.json

@@ -8,7 +8,7 @@
     "isomorphic-fetch": "^2.2.0"
   },
   "devDependencies": {
-    "babel": "^5.6.23",
+    "babel": "~5.6.23",
     "babel-eslint": "^4.1.3",
     "chai": "^3.2.0",
     "eslint": "^1.7.3",