refactor(pwa): rename components and move code to /src (#1490)

Rename component directories, files and stylesheets. Move app specific 
code to a `/src` directory. Update all location dependent scripts. Resolve
some linting issues -- it seems most of our content actually wasn't picked
up by alex prior to these changes. This commit fixes/ignores the new 
warnings that cropped up.

Author: pierreneter

.alexrc

@@ -2,23 +2,28 @@
   "allow": [
     "bigger",
     "color",
-    "lies",
+    "colors",
+    "crash",
+    "dead",
+    "dive",
     "execute",
     "executed",
     "execution",
-    "host-hostess",
+    "dirty",
     "disabled",
-    "crash",
+    "failed",
     "failure",
-    "period",
+    "fire",
     "hook",
-    "dirty",
     "host-hostess",
-    "fire",
-    "remains",
+    "hosts",
     "jade",
-    "failed",
-    "white",
-    "colors"
+    "laid",
+    "lies",
+    "period",
+    "pros",
+    "reject",
+    "remains",
+    "white"
   ]
 }

.gitignore

@@ -2,7 +2,7 @@ node_modules
 npm-debug.log
 build
 generated
-components/support/support-backers.json
-components/support/support-sponsors.json
-components/starter-kits/starter-kits-data.json
+src/components/Support/support-backers.json
+src/components/Support/support-sponsors.json
+src/components/StarterKits/starter-kits-data.json
 .antwar