Merge remote-tracking branch 'origin/psr-4'

* origin/psr-4:
  [tests] Add bootstrap back to not pollute prod-ish setups
  Update child repos to PSR-4 for git subs-plit
  PSR-4

Author: igorw

composer.json

@@ -4,20 +4,19 @@
     "keywords": ["stream", "pipe"],
     "license": "MIT",
     "require": {
-        "php": ">=5.3.3",
+        "php": ">=5.4.0",
         "evenement/evenement": "~2.0"
     },
     "suggest": {
-        "react/event-loop": "0.3.*",
-        "react/promise": "~1.0"
+        "react/event-loop": "0.4.*",
+        "react/promise": "~2.0"
     },
     "autoload": {
-        "psr-0": { "React\\Stream": "" }
+        "psr-4": { "React\\Stream\\": "" }
     },
-    "target-dir": "React/Stream",
     "extra": {
         "branch-alias": {
-            "dev-master": "0.3-dev"
+            "dev-master": "0.4-dev"
         }
     }
 }