Merge pull request #11 from nathanmarz/master

merge changes from nathanmarz/storm master
Netty based implementation for storm messaging
move storm-netty into its own module
fix indention
remove netty dependency from storm-core/project.clj
Merge pull request #12 from nathanmarz/master

merge changes from nathanmarz/storm master
TaskMessage enhanced to enable null payload
fixed test program and resource management
extra import removed from Context.java
project.clj fixed for module build
control request batch size per buffer spec; and 1 ack for each batch
Client rejects any request after its close() method has been invoked
use ControlMessage instead of previous TaskMessage hack
ControlMessage reorgnized for better readability
debug message removed
encoder code revised for readibility
use == instead of equals() for control message
revision per Bobby/Derek comments
use Runnable instead of Timer to release client resources
use fixed size buffer for control messages