Add some basic examples

examples/basic-consumers-example/ping_consumer.rb

@@ -0,0 +1,18 @@
+require 'bunnyrun'
+
+class PingConsumer < BunnyRun::Consumer
+  queue 'ping'
+
+  exchange 'ping-pong', type: :direct
+  bind 'ping-pong', routing_key: 'ping'
+
+  manual_ack true # default is false
+
+  def perform(message)
+    logger.info "#{self.class} received: #{message.payload}"
+    sleep 1
+
+    publish('ping-pong', 'PONG', routing_key: 'pong')
+    message.ack
+  end
+end