README.md in rflow-1.0.0a1 vs README.md in rflow-1.0.0a2

@@ -26,11 +26,16 @@
 is currently work being done to "shard" the workflow among multiple
 processes and/or threads.
 
 Some of the long-term goals of RFlow are to allow for components and
 portions of the workflow to be defined in any language that supports
-Avro and ZeroMQ, which a numerous.
+Avro and ZeroMQ, which are numerous.
 
+## Developer Notes
+
+You will need ZeroMQ preinstalled. Currently, EventMachine only supports
+v3.2.4, not v4.x, so install that version. Older versions like 2.2 will not
+work.
 
 ## Definitions
 
 * __Component__ - the basic unit of RFlow computation. Each
   component is a shared-nothing, individual computation module that