Merge tag 'v0.1.9' into develop

Front-end:
 - Exported files to directories for modularity
 - Expandable experiment configurator
 - Validate experiment
 - Shuffle scenes list
 - Block finished experiment
 - Fixed experiment bug when y > x

package.json

@@ -1,6 +1,6 @@
 {
   "name": "expe-web",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "private": true,
   "scripts": {
     "server:start": "node -r esm server/index.js",