config: drop the "conf" prefix for config files.

app/config/local.sample.yml

@@ -0,0 +1,22 @@
+
+application:
+  debug:      false
+
+# Database
+database:
+  adapter:    Mysql
+  host:       localhost
+  username:   user
+  password:   password
+  dbname:     httpcb
+  charset:    utf8
+
+#sendgrid
+  #key: value
+
+# OAuth
+#oauth:
+  #providers:
+    #github:
+      #clientId: value
+      #clientSecret: value